Prerequisites checklist

• I have read the contributing guidelines.

What is the purpose of this pull request? (put an "X" next to an item)

[ ] Documentation update
[x] Bug fix (template)
[ ] New rule (template)
[ ] Changes an existing rule (template)
[ ] Add autofix to a rule
[ ] Add a CLI option
[ ] Add something to the core
[ ] Other, please explain:

Tell us about your environment (npx eslint --env-info):

• Node version: v16.14.0
• npm version: v8.3.1
• Local ESLint version: v8.40.0
• Global ESLint version: no
• Operating System: windows

What parser are you using (place an "X" next to just one item)?

[x] Default (Espree)
[ ] @typescript-eslint/parser
[ ] @babel/eslint-parser
[ ] vue-eslint-parser
[ ] @angular-eslint/template-parser
[ ] Other

Please show your full configuration:

What did you do? Please include the actual source code causing the issue.

In eslint/eslint main branch, I ran this command:

eslint tests/fixtures/dot-files/.a.js

What did you expect to happen?

The flat config system doesn't ignore dotfiles by default. This file is ignored by pattern "tests/fixtures/**" in the config file.

I'd expect the common warning message for files ignored by the user's configuration:

 0:0  warning  File ignored because of a matching ignore pattern. Use "--no-ignore" to override

What actually happened? Please include the actual, raw output from ESLint.

The message suggests that the file is ignored by default:

  0:0  warning  File ignored by default.  Use a negated ignore pattern (like "--ignore-pattern '!<relative/path/to/filename>'") to override

What changes did you make? (Give an overview)

In function createIgnoreResult, I removed the conditional for dotfiles. After the change, this case will fall into the "File ignored because of a matching ignore pattern" branch.

Is there anything you'd like reviewers to focus on?