Is your enhancement request related to a problem? Please describe.
Sometimes lexers that are submitted are created by copying and pasting existing lexers. While this is not a bad way to begin development, a lexer should not be sufficiently differentiated from existing lexers. In #1206, @jneen added a mechanism to test the similarity of lexers.

Describe the solution you'd like
As part of Travis' build process, it would test the similarity of the lexer that was being added/modified to existing lexers.