From d6909112bc9d375350a8c4701862635f834d30c5 Mon Sep 17 00:00:00 2001
From: Ashwin Maroli <ashmaroli@gmail.com>
Date: Sun, 18 Mar 2018 19:06:31 +0530
Subject: [PATCH] add frozen_string_literal: true magic comment

---
 lib/rouge.rb                              | 1 +
 lib/rouge/cli.rb                          | 3 ++-
 lib/rouge/formatter.rb                    | 3 ++-
 lib/rouge/formatters/html.rb              | 1 +
 lib/rouge/formatters/html_inline.rb       | 1 +
 lib/rouge/formatters/html_legacy.rb       | 1 +
 lib/rouge/formatters/html_linewise.rb     | 1 +
 lib/rouge/formatters/html_pygments.rb     | 2 ++
 lib/rouge/formatters/html_table.rb        | 3 ++-
 lib/rouge/formatters/null.rb              | 1 +
 lib/rouge/formatters/terminal256.rb       | 1 +
 lib/rouge/guesser.rb                      | 2 ++
 lib/rouge/guessers/disambiguation.rb      | 2 ++
 lib/rouge/guessers/filename.rb            | 2 ++
 lib/rouge/guessers/glob_mapping.rb        | 2 ++
 lib/rouge/guessers/mimetype.rb            | 2 ++
 lib/rouge/guessers/modeline.rb            | 2 ++
 lib/rouge/guessers/source.rb              | 2 ++
 lib/rouge/guessers/util.rb                | 2 ++
 lib/rouge/lexer.rb                        | 1 +
 lib/rouge/lexers/abap.rb                  | 2 ++
 lib/rouge/lexers/actionscript.rb          | 1 +
 lib/rouge/lexers/apache.rb                | 2 ++
 lib/rouge/lexers/apiblueprint.rb          | 2 ++
 lib/rouge/lexers/apple_script.rb          | 2 ++
 lib/rouge/lexers/awk.rb                   | 1 +
 lib/rouge/lexers/biml.rb                  | 2 ++
 lib/rouge/lexers/bsl.rb                   | 1 +
 lib/rouge/lexers/c.rb                     | 1 +
 lib/rouge/lexers/ceylon.rb                | 1 +
 lib/rouge/lexers/cfscript.rb              | 1 +
 lib/rouge/lexers/clojure.rb               | 1 +
 lib/rouge/lexers/cmake.rb                 | 1 +
 lib/rouge/lexers/coffeescript.rb          | 1 +
 lib/rouge/lexers/common_lisp.rb           | 1 +
 lib/rouge/lexers/conf.rb                  | 1 +
 lib/rouge/lexers/console.rb               | 1 +
 lib/rouge/lexers/coq.rb                   | 1 +
 lib/rouge/lexers/cpp.rb                   | 1 +
 lib/rouge/lexers/csharp.rb                | 1 +
 lib/rouge/lexers/css.rb                   | 1 +
 lib/rouge/lexers/d.rb                     | 1 +
 lib/rouge/lexers/dart.rb                  | 1 +
 lib/rouge/lexers/diff.rb                  | 2 ++
 lib/rouge/lexers/digdag.rb                | 2 ++
 lib/rouge/lexers/docker.rb                | 1 +
 lib/rouge/lexers/dot.rb                   | 1 +
 lib/rouge/lexers/eiffel.rb                | 1 +
 lib/rouge/lexers/elixir.rb                | 1 +
 lib/rouge/lexers/elm.rb                   | 1 +
 lib/rouge/lexers/erb.rb                   | 1 +
 lib/rouge/lexers/erlang.rb                | 1 +
 lib/rouge/lexers/factor.rb                | 1 +
 lib/rouge/lexers/fortran.rb               | 2 ++
 lib/rouge/lexers/fsharp.rb                | 1 +
 lib/rouge/lexers/gherkin.rb               | 1 +
 lib/rouge/lexers/glsl.rb                  | 1 +
 lib/rouge/lexers/go.rb                    | 1 +
 lib/rouge/lexers/gradle.rb                | 1 +
 lib/rouge/lexers/graphql.rb               | 1 +
 lib/rouge/lexers/groovy.rb                | 1 +
 lib/rouge/lexers/hack.rb                  | 1 +
 lib/rouge/lexers/haml.rb                  | 1 +
 lib/rouge/lexers/handlebars.rb            | 1 +
 lib/rouge/lexers/haskell.rb               | 1 +
 lib/rouge/lexers/html.rb                  | 1 +
 lib/rouge/lexers/http.rb                  | 1 +
 lib/rouge/lexers/hylang.rb                | 1 +
 lib/rouge/lexers/idlang.rb                | 2 ++
 lib/rouge/lexers/igorpro.rb               | 1 +
 lib/rouge/lexers/ini.rb                   | 1 +
 lib/rouge/lexers/io.rb                    | 1 +
 lib/rouge/lexers/irb.rb                   | 1 +
 lib/rouge/lexers/java.rb                  | 1 +
 lib/rouge/lexers/javascript.rb            | 1 +
 lib/rouge/lexers/jinja.rb                 | 1 +
 lib/rouge/lexers/json.rb                  | 1 +
 lib/rouge/lexers/json_doc.rb              | 1 +
 lib/rouge/lexers/jsonnet.rb               | 1 +
 lib/rouge/lexers/jsx.rb                   | 2 ++
 lib/rouge/lexers/julia.rb                 | 1 +
 lib/rouge/lexers/kotlin.rb                | 1 +
 lib/rouge/lexers/lasso.rb                 | 1 +
 lib/rouge/lexers/liquid.rb                | 1 +
 lib/rouge/lexers/literate_coffeescript.rb | 1 +
 lib/rouge/lexers/literate_haskell.rb      | 1 +
 lib/rouge/lexers/llvm.rb                  | 1 +
 lib/rouge/lexers/lua.rb                   | 1 +
 lib/rouge/lexers/make.rb                  | 1 +
 lib/rouge/lexers/markdown.rb              | 1 +
 lib/rouge/lexers/matlab.rb                | 1 +
 lib/rouge/lexers/moonscript.rb            | 1 +
 lib/rouge/lexers/mosel.rb                 | 1 +
 lib/rouge/lexers/mxml.rb                  | 1 +
 lib/rouge/lexers/nasm.rb                  | 1 +
 lib/rouge/lexers/nginx.rb                 | 1 +
 lib/rouge/lexers/nim.rb                   | 1 +
 lib/rouge/lexers/nix.rb                   | 1 +
 lib/rouge/lexers/objective_c.rb           | 1 +
 lib/rouge/lexers/ocaml.rb                 | 1 +
 lib/rouge/lexers/pascal.rb                | 1 +
 lib/rouge/lexers/perl.rb                  | 1 +
 lib/rouge/lexers/php.rb                   | 1 +
 lib/rouge/lexers/php/builtins.rb          | 2 ++
 lib/rouge/lexers/plain_text.rb            | 1 +
 lib/rouge/lexers/plist.rb                 | 2 ++
 lib/rouge/lexers/pony.rb                  | 1 +
 lib/rouge/lexers/powershell.rb            | 1 +
 lib/rouge/lexers/praat.rb                 | 1 +
 lib/rouge/lexers/prolog.rb                | 1 +
 lib/rouge/lexers/prometheus.rb            | 2 ++
 lib/rouge/lexers/properties.rb            | 1 +
 lib/rouge/lexers/protobuf.rb              | 1 +
 lib/rouge/lexers/puppet.rb                | 1 +
 lib/rouge/lexers/python.rb                | 1 +
 lib/rouge/lexers/q.rb                     | 2 ++
 lib/rouge/lexers/qml.rb                   | 1 +
 lib/rouge/lexers/r.rb                     | 1 +
 lib/rouge/lexers/racket.rb                | 2 ++
 lib/rouge/lexers/ruby.rb                  | 1 +
 lib/rouge/lexers/rust.rb                  | 1 +
 lib/rouge/lexers/sass.rb                  | 1 +
 lib/rouge/lexers/sass/common.rb           | 1 +
 lib/rouge/lexers/scala.rb                 | 1 +
 lib/rouge/lexers/scheme.rb                | 1 +
 lib/rouge/lexers/scss.rb                  | 1 +
 lib/rouge/lexers/sed.rb                   | 1 +
 lib/rouge/lexers/shell.rb                 | 1 +
 lib/rouge/lexers/sieve.rb                 | 1 +
 lib/rouge/lexers/slim.rb                  | 1 +
 lib/rouge/lexers/smalltalk.rb             | 1 +
 lib/rouge/lexers/smarty.rb                | 1 +
 lib/rouge/lexers/sml.rb                   | 1 +
 lib/rouge/lexers/sql.rb                   | 1 +
 lib/rouge/lexers/swift.rb                 | 1 +
 lib/rouge/lexers/tap.rb                   | 2 ++
 lib/rouge/lexers/tcl.rb                   | 1 +
 lib/rouge/lexers/tex.rb                   | 1 +
 lib/rouge/lexers/toml.rb                  | 1 +
 lib/rouge/lexers/tsx.rb                   | 1 +
 lib/rouge/lexers/tulip.rb                 | 2 ++
 lib/rouge/lexers/turtle.rb                | 1 +
 lib/rouge/lexers/twig.rb                  | 1 +
 lib/rouge/lexers/typescript.rb            | 1 +
 lib/rouge/lexers/typescript/common.rb     | 1 +
 lib/rouge/lexers/vala.rb                  | 1 +
 lib/rouge/lexers/vb.rb                    | 1 +
 lib/rouge/lexers/verilog.rb               | 1 +
 lib/rouge/lexers/vhdl.rb                  | 1 +
 lib/rouge/lexers/viml.rb                  | 1 +
 lib/rouge/lexers/vue.rb                   | 2 ++
 lib/rouge/lexers/wollok.rb                | 1 +
 lib/rouge/lexers/xml.rb                   | 1 +
 lib/rouge/lexers/yaml.rb                  | 1 +
 lib/rouge/plugins/redcarpet.rb            | 1 +
 lib/rouge/regex_lexer.rb                  | 1 +
 lib/rouge/template_lexer.rb               | 1 +
 lib/rouge/text_analyzer.rb                | 1 +
 lib/rouge/theme.rb                        | 1 +
 lib/rouge/themes/base16.rb                | 1 +
 lib/rouge/themes/colorful.rb              | 1 +
 lib/rouge/themes/github.rb                | 1 +
 lib/rouge/themes/gruvbox.rb               | 1 +
 lib/rouge/themes/igor_pro.rb              | 1 +
 lib/rouge/themes/molokai.rb               | 1 +
 lib/rouge/themes/monokai.rb               | 1 +
 lib/rouge/themes/monokai_sublime.rb       | 2 ++
 lib/rouge/themes/pastie.rb                | 1 +
 lib/rouge/themes/thankful_eyes.rb         | 1 +
 lib/rouge/themes/tulip.rb                 | 1 +
 lib/rouge/token.rb                        | 1 +
 lib/rouge/util.rb                         | 1 +
 lib/rouge/version.rb                      | 1 +
 tasks/gherkin.rake                        | 2 ++
 tasks/lua.rake                            | 2 ++
 tasks/matlab.rake                         | 2 ++
 tasks/php.rake                            | 2 ++
 tasks/vim.rake                            | 2 ++
 178 files changed, 214 insertions(+), 3 deletions(-)

diff --git a/lib/rouge.rb b/lib/rouge.rb
index ac049c3f53..0877d8536e 100644
--- a/lib/rouge.rb
+++ b/lib/rouge.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 # stdlib
 require 'pathname'
diff --git a/lib/rouge/cli.rb b/lib/rouge/cli.rb
index a8ce3d159b..f120c0cb08 100644
--- a/lib/rouge/cli.rb
+++ b/lib/rouge/cli.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 # not required by the main lib.
 # to use this module, require 'rouge/cli'.
@@ -363,7 +364,7 @@ def run
         puts "== Available Lexers =="
 
         Lexer.all.sort_by(&:tag).each do |lexer|
-          desc = "#{lexer.desc}"
+          desc = String.new("#{lexer.desc}")
           if lexer.aliases.any?
             desc << " [aliases: #{lexer.aliases.join(',')}]"
           end
diff --git a/lib/rouge/formatter.rb b/lib/rouge/formatter.rb
index 8dddb94783..6eeb177fd7 100644
--- a/lib/rouge/formatter.rb
+++ b/lib/rouge/formatter.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   # A Formatter takes a token stream and formats it for human viewing.
@@ -33,7 +34,7 @@ def initialize(opts={})
     def format(tokens, &b)
       return stream(tokens, &b) if block_given?
 
-      out = ''
+      out = String.new('')
       stream(tokens) { |piece| out << piece }
 
       out
diff --git a/lib/rouge/formatters/html.rb b/lib/rouge/formatters/html.rb
index 2093a34e2b..de98dce804 100644
--- a/lib/rouge/formatters/html.rb
+++ b/lib/rouge/formatters/html.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Formatters
diff --git a/lib/rouge/formatters/html_inline.rb b/lib/rouge/formatters/html_inline.rb
index b41f70c0cd..e7f34399b2 100644
--- a/lib/rouge/formatters/html_inline.rb
+++ b/lib/rouge/formatters/html_inline.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Formatters
diff --git a/lib/rouge/formatters/html_legacy.rb b/lib/rouge/formatters/html_legacy.rb
index 813cefb81f..8327564531 100644
--- a/lib/rouge/formatters/html_legacy.rb
+++ b/lib/rouge/formatters/html_legacy.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 # stdlib
 require 'cgi'
diff --git a/lib/rouge/formatters/html_linewise.rb b/lib/rouge/formatters/html_linewise.rb
index 55c8e72ae9..9510aa600a 100644
--- a/lib/rouge/formatters/html_linewise.rb
+++ b/lib/rouge/formatters/html_linewise.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Formatters
diff --git a/lib/rouge/formatters/html_pygments.rb b/lib/rouge/formatters/html_pygments.rb
index ea895ea517..8ed8f54839 100644
--- a/lib/rouge/formatters/html_pygments.rb
+++ b/lib/rouge/formatters/html_pygments.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Formatters
     class HTMLPygments < Formatter
diff --git a/lib/rouge/formatters/html_table.rb b/lib/rouge/formatters/html_table.rb
index 42586d7281..01d94e4bdb 100644
--- a/lib/rouge/formatters/html_table.rb
+++ b/lib/rouge/formatters/html_table.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Formatters
@@ -22,7 +23,7 @@ def style(scope)
       def stream(tokens, &b)
         num_lines = 0
         last_val = ''
-        formatted = ''
+        formatted = String.new('')
 
         tokens.each do |tok, val|
           last_val = val
diff --git a/lib/rouge/formatters/null.rb b/lib/rouge/formatters/null.rb
index 01036d9a26..078c461ca9 100644
--- a/lib/rouge/formatters/null.rb
+++ b/lib/rouge/formatters/null.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Formatters
diff --git a/lib/rouge/formatters/terminal256.rb b/lib/rouge/formatters/terminal256.rb
index d5ba2e3314..b9af6a8297 100644
--- a/lib/rouge/formatters/terminal256.rb
+++ b/lib/rouge/formatters/terminal256.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Formatters
diff --git a/lib/rouge/guesser.rb b/lib/rouge/guesser.rb
index 6fa35c094b..7cfc3e676c 100644
--- a/lib/rouge/guesser.rb
+++ b/lib/rouge/guesser.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   class Guesser
     class Ambiguous < StandardError
diff --git a/lib/rouge/guessers/disambiguation.rb b/lib/rouge/guessers/disambiguation.rb
index 59f1a6af2e..de4af450e7 100644
--- a/lib/rouge/guessers/disambiguation.rb
+++ b/lib/rouge/guessers/disambiguation.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Guessers
     class Disambiguation < Guesser
diff --git a/lib/rouge/guessers/filename.rb b/lib/rouge/guessers/filename.rb
index f26bc04ab1..2f01b4c9d8 100644
--- a/lib/rouge/guessers/filename.rb
+++ b/lib/rouge/guessers/filename.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Guessers
     class Filename < Guesser
diff --git a/lib/rouge/guessers/glob_mapping.rb b/lib/rouge/guessers/glob_mapping.rb
index f703ac6e81..f635328f64 100644
--- a/lib/rouge/guessers/glob_mapping.rb
+++ b/lib/rouge/guessers/glob_mapping.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Guessers
     # This class allows for custom behavior
diff --git a/lib/rouge/guessers/mimetype.rb b/lib/rouge/guessers/mimetype.rb
index c5ef01787a..92a1d43e15 100644
--- a/lib/rouge/guessers/mimetype.rb
+++ b/lib/rouge/guessers/mimetype.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Guessers
     class Mimetype < Guesser
diff --git a/lib/rouge/guessers/modeline.rb b/lib/rouge/guessers/modeline.rb
index 316e4bb892..60f0c556e1 100644
--- a/lib/rouge/guessers/modeline.rb
+++ b/lib/rouge/guessers/modeline.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Guessers
     class Modeline < Guesser
diff --git a/lib/rouge/guessers/source.rb b/lib/rouge/guessers/source.rb
index b1f8dbf810..b3e90cbb76 100644
--- a/lib/rouge/guessers/source.rb
+++ b/lib/rouge/guessers/source.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Guessers
     class Source < Guesser
diff --git a/lib/rouge/guessers/util.rb b/lib/rouge/guessers/util.rb
index e4499ea7cf..89c50bec98 100644
--- a/lib/rouge/guessers/util.rb
+++ b/lib/rouge/guessers/util.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Guessers
     module Util
diff --git a/lib/rouge/lexer.rb b/lib/rouge/lexer.rb
index cc86a63d19..7fd93db25b 100644
--- a/lib/rouge/lexer.rb
+++ b/lib/rouge/lexer.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 # stdlib
 require 'strscan'
diff --git a/lib/rouge/lexers/abap.rb b/lib/rouge/lexers/abap.rb
index 6e1f9f5b01..01137721ed 100644
--- a/lib/rouge/lexers/abap.rb
+++ b/lib/rouge/lexers/abap.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 # ABAP elements taken from http://help.sap.com/abapdocu_750/en/index.htm?file=abapdo.htm
 
 module Rouge
diff --git a/lib/rouge/lexers/actionscript.rb b/lib/rouge/lexers/actionscript.rb
index cfe5d7c360..4db4b72312 100644
--- a/lib/rouge/lexers/actionscript.rb
+++ b/lib/rouge/lexers/actionscript.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/apache.rb b/lib/rouge/lexers/apache.rb
index ad35d69ec8..e07390e347 100644
--- a/lib/rouge/lexers/apache.rb
+++ b/lib/rouge/lexers/apache.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'yaml'
 
 module Rouge
diff --git a/lib/rouge/lexers/apiblueprint.rb b/lib/rouge/lexers/apiblueprint.rb
index ef5d4a9794..7695c39081 100644
--- a/lib/rouge/lexers/apiblueprint.rb
+++ b/lib/rouge/lexers/apiblueprint.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     load_lexer 'markdown.rb'
diff --git a/lib/rouge/lexers/apple_script.rb b/lib/rouge/lexers/apple_script.rb
index 785a215917..cc01bf2f7e 100644
--- a/lib/rouge/lexers/apple_script.rb
+++ b/lib/rouge/lexers/apple_script.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     class AppleScript < RegexLexer
diff --git a/lib/rouge/lexers/awk.rb b/lib/rouge/lexers/awk.rb
index 9d3deab7c0..257e72b3bd 100644
--- a/lib/rouge/lexers/awk.rb
+++ b/lib/rouge/lexers/awk.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/biml.rb b/lib/rouge/lexers/biml.rb
index ca0cdbfc85..bc8e82858a 100644
--- a/lib/rouge/lexers/biml.rb
+++ b/lib/rouge/lexers/biml.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     load_lexer 'xml.rb'
diff --git a/lib/rouge/lexers/bsl.rb b/lib/rouge/lexers/bsl.rb
index a42ef56db1..92fe471410 100644
--- a/lib/rouge/lexers/bsl.rb
+++ b/lib/rouge/lexers/bsl.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/c.rb b/lib/rouge/lexers/c.rb
index d2f246b53f..89ac83125b 100644
--- a/lib/rouge/lexers/c.rb
+++ b/lib/rouge/lexers/c.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/ceylon.rb b/lib/rouge/lexers/ceylon.rb
index e96ac20896..c06bfd041a 100644
--- a/lib/rouge/lexers/ceylon.rb
+++ b/lib/rouge/lexers/ceylon.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/cfscript.rb b/lib/rouge/lexers/cfscript.rb
index d3f65a0c3c..149ad60185 100644
--- a/lib/rouge/lexers/cfscript.rb
+++ b/lib/rouge/lexers/cfscript.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/clojure.rb b/lib/rouge/lexers/clojure.rb
index 5614368ec0..68f2048936 100644
--- a/lib/rouge/lexers/clojure.rb
+++ b/lib/rouge/lexers/clojure.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/cmake.rb b/lib/rouge/lexers/cmake.rb
index 57342e39a5..a11c68dfbd 100644
--- a/lib/rouge/lexers/cmake.rb
+++ b/lib/rouge/lexers/cmake.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/coffeescript.rb b/lib/rouge/lexers/coffeescript.rb
index 324877ac97..4eafc78c17 100644
--- a/lib/rouge/lexers/coffeescript.rb
+++ b/lib/rouge/lexers/coffeescript.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/common_lisp.rb b/lib/rouge/lexers/common_lisp.rb
index f5426a4b96..9357fa2997 100644
--- a/lib/rouge/lexers/common_lisp.rb
+++ b/lib/rouge/lexers/common_lisp.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/conf.rb b/lib/rouge/lexers/conf.rb
index 6815c469ab..f4722fbab2 100644
--- a/lib/rouge/lexers/conf.rb
+++ b/lib/rouge/lexers/conf.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/console.rb b/lib/rouge/lexers/console.rb
index 0a2b672785..30ab082ca9 100644
--- a/lib/rouge/lexers/console.rb
+++ b/lib/rouge/lexers/console.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/coq.rb b/lib/rouge/lexers/coq.rb
index 6e4a752b48..2067019595 100644
--- a/lib/rouge/lexers/coq.rb
+++ b/lib/rouge/lexers/coq.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/cpp.rb b/lib/rouge/lexers/cpp.rb
index 5aec1e950c..83280bb778 100644
--- a/lib/rouge/lexers/cpp.rb
+++ b/lib/rouge/lexers/cpp.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/csharp.rb b/lib/rouge/lexers/csharp.rb
index 0e504b2ed4..7dc4fd52c3 100644
--- a/lib/rouge/lexers/csharp.rb
+++ b/lib/rouge/lexers/csharp.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/css.rb b/lib/rouge/lexers/css.rb
index eb86093da5..4792434470 100644
--- a/lib/rouge/lexers/css.rb
+++ b/lib/rouge/lexers/css.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/d.rb b/lib/rouge/lexers/d.rb
index a985e1d106..be8be00112 100644
--- a/lib/rouge/lexers/d.rb
+++ b/lib/rouge/lexers/d.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/dart.rb b/lib/rouge/lexers/dart.rb
index e1884a1226..37237ed11d 100644
--- a/lib/rouge/lexers/dart.rb
+++ b/lib/rouge/lexers/dart.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/diff.rb b/lib/rouge/lexers/diff.rb
index b34ebe7083..0f44832392 100644
--- a/lib/rouge/lexers/diff.rb
+++ b/lib/rouge/lexers/diff.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     class Diff < RegexLexer
diff --git a/lib/rouge/lexers/digdag.rb b/lib/rouge/lexers/digdag.rb
index e6f719e30e..f9c6c7d80c 100644
--- a/lib/rouge/lexers/digdag.rb
+++ b/lib/rouge/lexers/digdag.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'set'
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/docker.rb b/lib/rouge/lexers/docker.rb
index f65663e6ac..22c6b07144 100644
--- a/lib/rouge/lexers/docker.rb
+++ b/lib/rouge/lexers/docker.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/dot.rb b/lib/rouge/lexers/dot.rb
index 542e4ac04c..5e358d7068 100644
--- a/lib/rouge/lexers/dot.rb
+++ b/lib/rouge/lexers/dot.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/eiffel.rb b/lib/rouge/lexers/eiffel.rb
index 67ae66759c..46f5a004c9 100644
--- a/lib/rouge/lexers/eiffel.rb
+++ b/lib/rouge/lexers/eiffel.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/elixir.rb b/lib/rouge/lexers/elixir.rb
index 4a6e277525..68175e3ce4 100644
--- a/lib/rouge/lexers/elixir.rb
+++ b/lib/rouge/lexers/elixir.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/elm.rb b/lib/rouge/lexers/elm.rb
index 56f2c53420..80335fbcda 100644
--- a/lib/rouge/lexers/elm.rb
+++ b/lib/rouge/lexers/elm.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/erb.rb b/lib/rouge/lexers/erb.rb
index b2883b097c..5adf54b795 100644
--- a/lib/rouge/lexers/erb.rb
+++ b/lib/rouge/lexers/erb.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/erlang.rb b/lib/rouge/lexers/erlang.rb
index 5d03b46fad..031f2bd2bc 100644
--- a/lib/rouge/lexers/erlang.rb
+++ b/lib/rouge/lexers/erlang.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/factor.rb b/lib/rouge/lexers/factor.rb
index 5ea7cb41e2..267bcf3c40 100644
--- a/lib/rouge/lexers/factor.rb
+++ b/lib/rouge/lexers/factor.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/fortran.rb b/lib/rouge/lexers/fortran.rb
index 721f38b9a5..1341340734 100644
--- a/lib/rouge/lexers/fortran.rb
+++ b/lib/rouge/lexers/fortran.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 # vim: set ts=2 sw=2 et:
 
 # TODO: Implement format list support.
diff --git a/lib/rouge/lexers/fsharp.rb b/lib/rouge/lexers/fsharp.rb
index df5738524e..d171f0805f 100644
--- a/lib/rouge/lexers/fsharp.rb
+++ b/lib/rouge/lexers/fsharp.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/gherkin.rb b/lib/rouge/lexers/gherkin.rb
index cbdc6c6d9a..d45b29c42b 100644
--- a/lib/rouge/lexers/gherkin.rb
+++ b/lib/rouge/lexers/gherkin.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/glsl.rb b/lib/rouge/lexers/glsl.rb
index bff367461a..a9227ff36e 100644
--- a/lib/rouge/lexers/glsl.rb
+++ b/lib/rouge/lexers/glsl.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/go.rb b/lib/rouge/lexers/go.rb
index 443b96db3a..4a4837c88f 100644
--- a/lib/rouge/lexers/go.rb
+++ b/lib/rouge/lexers/go.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/gradle.rb b/lib/rouge/lexers/gradle.rb
index 8bf12cc8fc..27b5f967eb 100644
--- a/lib/rouge/lexers/gradle.rb
+++ b/lib/rouge/lexers/gradle.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/graphql.rb b/lib/rouge/lexers/graphql.rb
index f4fba4b38f..0277638b61 100644
--- a/lib/rouge/lexers/graphql.rb
+++ b/lib/rouge/lexers/graphql.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/groovy.rb b/lib/rouge/lexers/groovy.rb
index 43774f4608..5d470d54db 100644
--- a/lib/rouge/lexers/groovy.rb
+++ b/lib/rouge/lexers/groovy.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/hack.rb b/lib/rouge/lexers/hack.rb
index 1acf69b296..203e9a756a 100644
--- a/lib/rouge/lexers/hack.rb
+++ b/lib/rouge/lexers/hack.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/haml.rb b/lib/rouge/lexers/haml.rb
index 5466224e3e..3f19bc459d 100644
--- a/lib/rouge/lexers/haml.rb
+++ b/lib/rouge/lexers/haml.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/handlebars.rb b/lib/rouge/lexers/handlebars.rb
index 5ac8618862..8f9aac4acc 100644
--- a/lib/rouge/lexers/handlebars.rb
+++ b/lib/rouge/lexers/handlebars.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/haskell.rb b/lib/rouge/lexers/haskell.rb
index aa3fe00612..32f94d9df5 100644
--- a/lib/rouge/lexers/haskell.rb
+++ b/lib/rouge/lexers/haskell.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/html.rb b/lib/rouge/lexers/html.rb
index 3de6d44516..d2f9ddda81 100644
--- a/lib/rouge/lexers/html.rb
+++ b/lib/rouge/lexers/html.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/http.rb b/lib/rouge/lexers/http.rb
index 0fc4d7443b..75cbe07793 100644
--- a/lib/rouge/lexers/http.rb
+++ b/lib/rouge/lexers/http.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/hylang.rb b/lib/rouge/lexers/hylang.rb
index 1c1c6374ad..4592ba23eb 100644
--- a/lib/rouge/lexers/hylang.rb
+++ b/lib/rouge/lexers/hylang.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/idlang.rb b/lib/rouge/lexers/idlang.rb
index 0cacfcb454..47a61b9f55 100644
--- a/lib/rouge/lexers/idlang.rb
+++ b/lib/rouge/lexers/idlang.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 # vim: set ts=2 sw=2 et:
 
 module Rouge
diff --git a/lib/rouge/lexers/igorpro.rb b/lib/rouge/lexers/igorpro.rb
index 1a13fd0cf8..ae8a606926 100644
--- a/lib/rouge/lexers/igorpro.rb
+++ b/lib/rouge/lexers/igorpro.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/ini.rb b/lib/rouge/lexers/ini.rb
index f819cf33cd..a05fa42761 100644
--- a/lib/rouge/lexers/ini.rb
+++ b/lib/rouge/lexers/ini.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/io.rb b/lib/rouge/lexers/io.rb
index 01a3663c92..92dd1265c9 100644
--- a/lib/rouge/lexers/io.rb
+++ b/lib/rouge/lexers/io.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/irb.rb b/lib/rouge/lexers/irb.rb
index b35a297499..b7fc3963c1 100644
--- a/lib/rouge/lexers/irb.rb
+++ b/lib/rouge/lexers/irb.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/java.rb b/lib/rouge/lexers/java.rb
index 2322dd9422..2a51fcc973 100644
--- a/lib/rouge/lexers/java.rb
+++ b/lib/rouge/lexers/java.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/javascript.rb b/lib/rouge/lexers/javascript.rb
index 3b87ff70f8..bbce102b36 100644
--- a/lib/rouge/lexers/javascript.rb
+++ b/lib/rouge/lexers/javascript.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/jinja.rb b/lib/rouge/lexers/jinja.rb
index f159c26394..4ee76bbca6 100644
--- a/lib/rouge/lexers/jinja.rb
+++ b/lib/rouge/lexers/jinja.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/json.rb b/lib/rouge/lexers/json.rb
index 37a5bd6caa..d8c3e27d6a 100644
--- a/lib/rouge/lexers/json.rb
+++ b/lib/rouge/lexers/json.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/json_doc.rb b/lib/rouge/lexers/json_doc.rb
index 9b5c2b0d3d..6b33fd1347 100644
--- a/lib/rouge/lexers/json_doc.rb
+++ b/lib/rouge/lexers/json_doc.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/jsonnet.rb b/lib/rouge/lexers/jsonnet.rb
index 9502f19738..361c442712 100644
--- a/lib/rouge/lexers/jsonnet.rb
+++ b/lib/rouge/lexers/jsonnet.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/jsx.rb b/lib/rouge/lexers/jsx.rb
index 8daff5fd29..2af58f0c9f 100644
--- a/lib/rouge/lexers/jsx.rb
+++ b/lib/rouge/lexers/jsx.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     load_lexer 'javascript.rb'
diff --git a/lib/rouge/lexers/julia.rb b/lib/rouge/lexers/julia.rb
index 4e3a3dc182..62a64c602f 100644
--- a/lib/rouge/lexers/julia.rb
+++ b/lib/rouge/lexers/julia.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/kotlin.rb b/lib/rouge/lexers/kotlin.rb
index cb993d47f6..e78ed7503c 100644
--- a/lib/rouge/lexers/kotlin.rb
+++ b/lib/rouge/lexers/kotlin.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/lasso.rb b/lib/rouge/lexers/lasso.rb
index 24f1735255..6be6304bce 100644
--- a/lib/rouge/lexers/lasso.rb
+++ b/lib/rouge/lexers/lasso.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 require 'yaml'
 
diff --git a/lib/rouge/lexers/liquid.rb b/lib/rouge/lexers/liquid.rb
index c199196820..60a6130e05 100644
--- a/lib/rouge/lexers/liquid.rb
+++ b/lib/rouge/lexers/liquid.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/literate_coffeescript.rb b/lib/rouge/lexers/literate_coffeescript.rb
index 0c546ca614..d2a54c0b8a 100644
--- a/lib/rouge/lexers/literate_coffeescript.rb
+++ b/lib/rouge/lexers/literate_coffeescript.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/literate_haskell.rb b/lib/rouge/lexers/literate_haskell.rb
index d8708aaf3e..f4804d0653 100644
--- a/lib/rouge/lexers/literate_haskell.rb
+++ b/lib/rouge/lexers/literate_haskell.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/llvm.rb b/lib/rouge/lexers/llvm.rb
index 521933f6d2..277e3212b5 100644
--- a/lib/rouge/lexers/llvm.rb
+++ b/lib/rouge/lexers/llvm.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/lua.rb b/lib/rouge/lexers/lua.rb
index a22db63bc7..6b0cc8be24 100644
--- a/lib/rouge/lexers/lua.rb
+++ b/lib/rouge/lexers/lua.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/make.rb b/lib/rouge/lexers/make.rb
index 66992cc92f..4b85264b96 100644
--- a/lib/rouge/lexers/make.rb
+++ b/lib/rouge/lexers/make.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/markdown.rb b/lib/rouge/lexers/markdown.rb
index 76710b5e03..41c949ca6b 100644
--- a/lib/rouge/lexers/markdown.rb
+++ b/lib/rouge/lexers/markdown.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/matlab.rb b/lib/rouge/lexers/matlab.rb
index ea42c2a190..ecd378d79e 100644
--- a/lib/rouge/lexers/matlab.rb
+++ b/lib/rouge/lexers/matlab.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/moonscript.rb b/lib/rouge/lexers/moonscript.rb
index ac3c8f2d6a..229ba147dc 100644
--- a/lib/rouge/lexers/moonscript.rb
+++ b/lib/rouge/lexers/moonscript.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/mosel.rb b/lib/rouge/lexers/mosel.rb
index 54a8d7a30c..a87a2b1bbc 100644
--- a/lib/rouge/lexers/mosel.rb
+++ b/lib/rouge/lexers/mosel.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/mxml.rb b/lib/rouge/lexers/mxml.rb
index 7055e2571c..6342281e1e 100644
--- a/lib/rouge/lexers/mxml.rb
+++ b/lib/rouge/lexers/mxml.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/nasm.rb b/lib/rouge/lexers/nasm.rb
index b413007d7c..5a5bb99a2f 100644
--- a/lib/rouge/lexers/nasm.rb
+++ b/lib/rouge/lexers/nasm.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/nginx.rb b/lib/rouge/lexers/nginx.rb
index ac361a7001..bc842d7602 100644
--- a/lib/rouge/lexers/nginx.rb
+++ b/lib/rouge/lexers/nginx.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/nim.rb b/lib/rouge/lexers/nim.rb
index 8a470df2a2..06f6f3b6a8 100644
--- a/lib/rouge/lexers/nim.rb
+++ b/lib/rouge/lexers/nim.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/nix.rb b/lib/rouge/lexers/nix.rb
index fb73aaa8b2..32505949d8 100644
--- a/lib/rouge/lexers/nix.rb
+++ b/lib/rouge/lexers/nix.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/objective_c.rb b/lib/rouge/lexers/objective_c.rb
index 5af1a5aa89..96ecf10765 100644
--- a/lib/rouge/lexers/objective_c.rb
+++ b/lib/rouge/lexers/objective_c.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/ocaml.rb b/lib/rouge/lexers/ocaml.rb
index f0f994711b..0284dae228 100644
--- a/lib/rouge/lexers/ocaml.rb
+++ b/lib/rouge/lexers/ocaml.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/pascal.rb b/lib/rouge/lexers/pascal.rb
index 98f06cdab9..e6f4067be4 100644
--- a/lib/rouge/lexers/pascal.rb
+++ b/lib/rouge/lexers/pascal.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/perl.rb b/lib/rouge/lexers/perl.rb
index af0386fd2b..343d48c64c 100644
--- a/lib/rouge/lexers/perl.rb
+++ b/lib/rouge/lexers/perl.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/php.rb b/lib/rouge/lexers/php.rb
index 1585e63250..10061fa642 100644
--- a/lib/rouge/lexers/php.rb
+++ b/lib/rouge/lexers/php.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/php/builtins.rb b/lib/rouge/lexers/php/builtins.rb
index e4718a291a..d9db725156 100644
--- a/lib/rouge/lexers/php/builtins.rb
+++ b/lib/rouge/lexers/php/builtins.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 # automatically generated by `rake builtins:php`
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/plain_text.rb b/lib/rouge/lexers/plain_text.rb
index 016752d643..617076bc35 100644
--- a/lib/rouge/lexers/plain_text.rb
+++ b/lib/rouge/lexers/plain_text.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/plist.rb b/lib/rouge/lexers/plist.rb
index dfd8471288..a4c7557950 100644
--- a/lib/rouge/lexers/plist.rb
+++ b/lib/rouge/lexers/plist.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     class Plist < RegexLexer
diff --git a/lib/rouge/lexers/pony.rb b/lib/rouge/lexers/pony.rb
index 6e7908d10b..3abd061df0 100644
--- a/lib/rouge/lexers/pony.rb
+++ b/lib/rouge/lexers/pony.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/powershell.rb b/lib/rouge/lexers/powershell.rb
index 48ff90ec06..6bee704d45 100644
--- a/lib/rouge/lexers/powershell.rb
+++ b/lib/rouge/lexers/powershell.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/praat.rb b/lib/rouge/lexers/praat.rb
index 5474834133..dc62c6e81c 100644
--- a/lib/rouge/lexers/praat.rb
+++ b/lib/rouge/lexers/praat.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/prolog.rb b/lib/rouge/lexers/prolog.rb
index 64d294940e..05cf9bbf99 100644
--- a/lib/rouge/lexers/prolog.rb
+++ b/lib/rouge/lexers/prolog.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/prometheus.rb b/lib/rouge/lexers/prometheus.rb
index 7409559f83..0bb1c33ca9 100644
--- a/lib/rouge/lexers/prometheus.rb
+++ b/lib/rouge/lexers/prometheus.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     class Prometheus < RegexLexer
diff --git a/lib/rouge/lexers/properties.rb b/lib/rouge/lexers/properties.rb
index d6dddf01c3..8f876bfc86 100644
--- a/lib/rouge/lexers/properties.rb
+++ b/lib/rouge/lexers/properties.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/protobuf.rb b/lib/rouge/lexers/protobuf.rb
index a5e24dd346..9d8d753d6f 100644
--- a/lib/rouge/lexers/protobuf.rb
+++ b/lib/rouge/lexers/protobuf.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/puppet.rb b/lib/rouge/lexers/puppet.rb
index eabdbc3d12..ffbec26622 100644
--- a/lib/rouge/lexers/puppet.rb
+++ b/lib/rouge/lexers/puppet.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/python.rb b/lib/rouge/lexers/python.rb
index 987efa3da1..1f966f9eca 100644
--- a/lib/rouge/lexers/python.rb
+++ b/lib/rouge/lexers/python.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/q.rb b/lib/rouge/lexers/q.rb
index 196cac4b2f..ad18b8830b 100644
--- a/lib/rouge/lexers/q.rb
+++ b/lib/rouge/lexers/q.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     class Q < RegexLexer
diff --git a/lib/rouge/lexers/qml.rb b/lib/rouge/lexers/qml.rb
index 51dbac78f5..c545de36b0 100644
--- a/lib/rouge/lexers/qml.rb
+++ b/lib/rouge/lexers/qml.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/r.rb b/lib/rouge/lexers/r.rb
index d09070e085..423d7d9319 100644
--- a/lib/rouge/lexers/r.rb
+++ b/lib/rouge/lexers/r.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/racket.rb b/lib/rouge/lexers/racket.rb
index af9ff683eb..b4bd8f8761 100644
--- a/lib/rouge/lexers/racket.rb
+++ b/lib/rouge/lexers/racket.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     class Racket < RegexLexer
diff --git a/lib/rouge/lexers/ruby.rb b/lib/rouge/lexers/ruby.rb
index 25beaa6beb..1f3291c206 100644
--- a/lib/rouge/lexers/ruby.rb
+++ b/lib/rouge/lexers/ruby.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/rust.rb b/lib/rouge/lexers/rust.rb
index e8c524eaf2..b9fd649d5d 100644
--- a/lib/rouge/lexers/rust.rb
+++ b/lib/rouge/lexers/rust.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/sass.rb b/lib/rouge/lexers/sass.rb
index 7382fe8eca..44fbe82de3 100644
--- a/lib/rouge/lexers/sass.rb
+++ b/lib/rouge/lexers/sass.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/sass/common.rb b/lib/rouge/lexers/sass/common.rb
index 25bb5461f3..27850dbefe 100644
--- a/lib/rouge/lexers/sass/common.rb
+++ b/lib/rouge/lexers/sass/common.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/scala.rb b/lib/rouge/lexers/scala.rb
index f8ba463be8..0b0e9a410c 100644
--- a/lib/rouge/lexers/scala.rb
+++ b/lib/rouge/lexers/scala.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/scheme.rb b/lib/rouge/lexers/scheme.rb
index 41baa321a6..5a856102f6 100644
--- a/lib/rouge/lexers/scheme.rb
+++ b/lib/rouge/lexers/scheme.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/scss.rb b/lib/rouge/lexers/scss.rb
index 35d160a067..4510a5f410 100644
--- a/lib/rouge/lexers/scss.rb
+++ b/lib/rouge/lexers/scss.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/sed.rb b/lib/rouge/lexers/sed.rb
index 14bab41520..55eb1b9265 100644
--- a/lib/rouge/lexers/sed.rb
+++ b/lib/rouge/lexers/sed.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/shell.rb b/lib/rouge/lexers/shell.rb
index 3164095186..4b7d7d72a7 100644
--- a/lib/rouge/lexers/shell.rb
+++ b/lib/rouge/lexers/shell.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/sieve.rb b/lib/rouge/lexers/sieve.rb
index 4b6528e1b0..a826f4d985 100644
--- a/lib/rouge/lexers/sieve.rb
+++ b/lib/rouge/lexers/sieve.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/slim.rb b/lib/rouge/lexers/slim.rb
index 6dea393453..f09ee3201e 100644
--- a/lib/rouge/lexers/slim.rb
+++ b/lib/rouge/lexers/slim.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/smalltalk.rb b/lib/rouge/lexers/smalltalk.rb
index 6f448c14d3..797a2c5c27 100644
--- a/lib/rouge/lexers/smalltalk.rb
+++ b/lib/rouge/lexers/smalltalk.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/smarty.rb b/lib/rouge/lexers/smarty.rb
index 58bf6df0be..e21b6e5011 100644
--- a/lib/rouge/lexers/smarty.rb
+++ b/lib/rouge/lexers/smarty.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/sml.rb b/lib/rouge/lexers/sml.rb
index ce0ccdd91a..2755dc9501 100644
--- a/lib/rouge/lexers/sml.rb
+++ b/lib/rouge/lexers/sml.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/sql.rb b/lib/rouge/lexers/sql.rb
index 23ec1cf827..60c15f4b97 100644
--- a/lib/rouge/lexers/sql.rb
+++ b/lib/rouge/lexers/sql.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/swift.rb b/lib/rouge/lexers/swift.rb
index b4d9cf8778..ca2fc29ef9 100644
--- a/lib/rouge/lexers/swift.rb
+++ b/lib/rouge/lexers/swift.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/tap.rb b/lib/rouge/lexers/tap.rb
index defb998c89..824c4fe73c 100644
--- a/lib/rouge/lexers/tap.rb
+++ b/lib/rouge/lexers/tap.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     class Tap < RegexLexer
diff --git a/lib/rouge/lexers/tcl.rb b/lib/rouge/lexers/tcl.rb
index 77262aa430..60f84f853d 100644
--- a/lib/rouge/lexers/tcl.rb
+++ b/lib/rouge/lexers/tcl.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/tex.rb b/lib/rouge/lexers/tex.rb
index 6d358b3902..fa8f0a5a73 100644
--- a/lib/rouge/lexers/tex.rb
+++ b/lib/rouge/lexers/tex.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/toml.rb b/lib/rouge/lexers/toml.rb
index e0ee149ba8..40ecd7a6a4 100644
--- a/lib/rouge/lexers/toml.rb
+++ b/lib/rouge/lexers/toml.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/tsx.rb b/lib/rouge/lexers/tsx.rb
index f917414532..043a526f23 100644
--- a/lib/rouge/lexers/tsx.rb
+++ b/lib/rouge/lexers/tsx.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/tulip.rb b/lib/rouge/lexers/tulip.rb
index a6a3ac5aa4..e26376b6b3 100644
--- a/lib/rouge/lexers/tulip.rb
+++ b/lib/rouge/lexers/tulip.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     class Tulip < RegexLexer
diff --git a/lib/rouge/lexers/turtle.rb b/lib/rouge/lexers/turtle.rb
index 33da7afb82..505086f4a6 100644
--- a/lib/rouge/lexers/turtle.rb
+++ b/lib/rouge/lexers/turtle.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/twig.rb b/lib/rouge/lexers/twig.rb
index 7eb61989a9..ad2d61a061 100644
--- a/lib/rouge/lexers/twig.rb
+++ b/lib/rouge/lexers/twig.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/typescript.rb b/lib/rouge/lexers/typescript.rb
index 71dfd11c33..353ca7ffd5 100644
--- a/lib/rouge/lexers/typescript.rb
+++ b/lib/rouge/lexers/typescript.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/typescript/common.rb b/lib/rouge/lexers/typescript/common.rb
index 7a3c37618d..7d161ff05f 100644
--- a/lib/rouge/lexers/typescript/common.rb
+++ b/lib/rouge/lexers/typescript/common.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/vala.rb b/lib/rouge/lexers/vala.rb
index 81a605ff4c..29101e4c13 100644
--- a/lib/rouge/lexers/vala.rb
+++ b/lib/rouge/lexers/vala.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/vb.rb b/lib/rouge/lexers/vb.rb
index b7f3d5f983..406465ad8d 100644
--- a/lib/rouge/lexers/vb.rb
+++ b/lib/rouge/lexers/vb.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/verilog.rb b/lib/rouge/lexers/verilog.rb
index 522f6d2079..812b8fae9a 100644
--- a/lib/rouge/lexers/verilog.rb
+++ b/lib/rouge/lexers/verilog.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/vhdl.rb b/lib/rouge/lexers/vhdl.rb
index 4b14c2831c..4255632ea3 100644
--- a/lib/rouge/lexers/vhdl.rb
+++ b/lib/rouge/lexers/vhdl.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/viml.rb b/lib/rouge/lexers/viml.rb
index 109e2cf28c..363ff9782a 100644
--- a/lib/rouge/lexers/viml.rb
+++ b/lib/rouge/lexers/viml.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/vue.rb b/lib/rouge/lexers/vue.rb
index 2a3b35fad4..59bd664cd8 100644
--- a/lib/rouge/lexers/vue.rb
+++ b/lib/rouge/lexers/vue.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rouge
   module Lexers
     load_lexer 'html.rb'
diff --git a/lib/rouge/lexers/wollok.rb b/lib/rouge/lexers/wollok.rb
index a8012fff59..c46960c9be 100644
--- a/lib/rouge/lexers/wollok.rb
+++ b/lib/rouge/lexers/wollok.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- # 
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/xml.rb b/lib/rouge/lexers/xml.rb
index 0773acddb4..0b95b3709c 100644
--- a/lib/rouge/lexers/xml.rb
+++ b/lib/rouge/lexers/xml.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/yaml.rb b/lib/rouge/lexers/yaml.rb
index 6d6a8b808a..4afb31c55a 100644
--- a/lib/rouge/lexers/yaml.rb
+++ b/lib/rouge/lexers/yaml.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/plugins/redcarpet.rb b/lib/rouge/plugins/redcarpet.rb
index 4ae513bc13..e70bd34a52 100644
--- a/lib/rouge/plugins/redcarpet.rb
+++ b/lib/rouge/plugins/redcarpet.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 # this file is not require'd from the root.  To use this plugin, run:
 #
diff --git a/lib/rouge/regex_lexer.rb b/lib/rouge/regex_lexer.rb
index 774530e98f..f1a0d0d3e5 100644
--- a/lib/rouge/regex_lexer.rb
+++ b/lib/rouge/regex_lexer.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   # @abstract
diff --git a/lib/rouge/template_lexer.rb b/lib/rouge/template_lexer.rb
index 8e063a84f5..384b37b359 100644
--- a/lib/rouge/template_lexer.rb
+++ b/lib/rouge/template_lexer.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   # @abstract
diff --git a/lib/rouge/text_analyzer.rb b/lib/rouge/text_analyzer.rb
index 834a0b11c2..0540ca4252 100644
--- a/lib/rouge/text_analyzer.rb
+++ b/lib/rouge/text_analyzer.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   class TextAnalyzer < String
diff --git a/lib/rouge/theme.rb b/lib/rouge/theme.rb
index be07425a0a..731da002b0 100644
--- a/lib/rouge/theme.rb
+++ b/lib/rouge/theme.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   class Theme
diff --git a/lib/rouge/themes/base16.rb b/lib/rouge/themes/base16.rb
index 9fea1c8add..bf62fa7211 100644
--- a/lib/rouge/themes/base16.rb
+++ b/lib/rouge/themes/base16.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Themes
diff --git a/lib/rouge/themes/colorful.rb b/lib/rouge/themes/colorful.rb
index b108fe6e14..b2de856acf 100644
--- a/lib/rouge/themes/colorful.rb
+++ b/lib/rouge/themes/colorful.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Themes
diff --git a/lib/rouge/themes/github.rb b/lib/rouge/themes/github.rb
index bc875a8474..de1c31e10f 100644
--- a/lib/rouge/themes/github.rb
+++ b/lib/rouge/themes/github.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Themes
diff --git a/lib/rouge/themes/gruvbox.rb b/lib/rouge/themes/gruvbox.rb
index 330803de67..25cd123a0b 100644
--- a/lib/rouge/themes/gruvbox.rb
+++ b/lib/rouge/themes/gruvbox.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 # TODO how are we going to handle soft/hard contrast?
 
diff --git a/lib/rouge/themes/igor_pro.rb b/lib/rouge/themes/igor_pro.rb
index a75a4cdcf7..adc53a2506 100644
--- a/lib/rouge/themes/igor_pro.rb
+++ b/lib/rouge/themes/igor_pro.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Themes
diff --git a/lib/rouge/themes/molokai.rb b/lib/rouge/themes/molokai.rb
index 6f14aa78df..119422f29c 100644
--- a/lib/rouge/themes/molokai.rb
+++ b/lib/rouge/themes/molokai.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Themes
diff --git a/lib/rouge/themes/monokai.rb b/lib/rouge/themes/monokai.rb
index 3273f7d7ac..e230d609b9 100644
--- a/lib/rouge/themes/monokai.rb
+++ b/lib/rouge/themes/monokai.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Themes
diff --git a/lib/rouge/themes/monokai_sublime.rb b/lib/rouge/themes/monokai_sublime.rb
index 5c700e79a5..bbecbf3f2d 100644
--- a/lib/rouge/themes/monokai_sublime.rb
+++ b/lib/rouge/themes/monokai_sublime.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 module Rouge
   module Themes
     class MonokaiSublime < CSSTheme
diff --git a/lib/rouge/themes/pastie.rb b/lib/rouge/themes/pastie.rb
index e8d9b6acdc..c297d163e1 100644
--- a/lib/rouge/themes/pastie.rb
+++ b/lib/rouge/themes/pastie.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Themes
diff --git a/lib/rouge/themes/thankful_eyes.rb b/lib/rouge/themes/thankful_eyes.rb
index dcb9aedb84..f0b5aa77fe 100644
--- a/lib/rouge/themes/thankful_eyes.rb
+++ b/lib/rouge/themes/thankful_eyes.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Themes
diff --git a/lib/rouge/themes/tulip.rb b/lib/rouge/themes/tulip.rb
index 938f65e175..90e0c7fb93 100644
--- a/lib/rouge/themes/tulip.rb
+++ b/lib/rouge/themes/tulip.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Themes
diff --git a/lib/rouge/token.rb b/lib/rouge/token.rb
index ce044a7718..110b054703 100644
--- a/lib/rouge/token.rb
+++ b/lib/rouge/token.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   class Token
diff --git a/lib/rouge/util.rb b/lib/rouge/util.rb
index 0c1f93a341..124cda8e96 100644
--- a/lib/rouge/util.rb
+++ b/lib/rouge/util.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   class InheritableHash < Hash
diff --git a/lib/rouge/version.rb b/lib/rouge/version.rb
index 0d7997ad4f..02429d7d40 100644
--- a/lib/rouge/version.rb
+++ b/lib/rouge/version.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   def self.version
diff --git a/tasks/gherkin.rake b/tasks/gherkin.rake
index f9a25ad357..a1cbc5d88e 100644
--- a/tasks/gherkin.rake
+++ b/tasks/gherkin.rake
@@ -28,6 +28,8 @@ module GherkinKeywords
 
   def source(&b)
     yield   '# -*- coding: utf-8 -*- #'
+    yield   '# frozen_string_literal: true'
+    yield   ''
     yield   '# automatically generated by `rake builtins:gherkin`'
     yield   'module Rouge'
     yield   '  module Lexers'
diff --git a/tasks/lua.rake b/tasks/lua.rake
index 8c9162e965..bf80951d7e 100644
--- a/tasks/lua.rake
+++ b/tasks/lua.rake
@@ -4,6 +4,8 @@ require 'open-uri'
 
 def lua_builtins_source(lua_functions)
   yield   "# -*- coding: utf-8 -*- #"
+  yield   "# frozen_string_literal: true"
+  yield   ""
   yield   "# automatically generated by `rake builtins:lua`"
   yield   "module Rouge"
   yield   "  module Lexers"
diff --git a/tasks/matlab.rake b/tasks/matlab.rake
index 94f133c32a..1363d28571 100644
--- a/tasks/matlab.rake
+++ b/tasks/matlab.rake
@@ -19,6 +19,8 @@ end
 
 def matlab_builtins_source
   yield   "# -*- coding: utf-8 -*- #"
+  yield   "# frozen_string_literal: true"
+  yield   ""
   yield   "# automatically generated by `rake builtins:matlab`"
   yield   "module Rouge"
   yield   "  module Lexers"
diff --git a/tasks/php.rake b/tasks/php.rake
index 9005418f8c..111cf2dfdb 100644
--- a/tasks/php.rake
+++ b/tasks/php.rake
@@ -31,6 +31,8 @@ end
 
 def php_builtins_source
   yield   "# -*- coding: utf-8 -*- #"
+  yield   "# frozen_string_literal: true"
+  yield   ""
   yield   "# automatically generated by `rake builtins:php`"
   yield   "module Rouge"
   yield   "  module Lexers"
diff --git a/tasks/vim.rake b/tasks/vim.rake
index 2aea1264f4..b4cbaf4e7c 100644
--- a/tasks/vim.rake
+++ b/tasks/vim.rake
@@ -33,6 +33,8 @@ def render_keywords(keywords, &b)
   return enum_for(:render_keywords, keywords).to_a.join("\n") unless b
 
   yield '# encoding: utf-8'
+  yield '# frozen_string_literal: true'
+  yield ''
   yield '# DO NOT EDIT: automatically generated by `rake builtins:vim`.'
   yield '# see tasks/vim.rake for more info.'
   yield 'module Rouge'