Ability for rules to autofix.
I know it's a big one and maybe it would be implemented in a long time only for a major version, but I can see real potential and that it would have been asked at one time.
Like eslint and stylelint, adding ability to rules to autofix if called with
--fix Automatically fix problems
--fix-dry-run Automatically fix problems without saving the changes to the file system
For first implementation, it's not needed that any rules is fixable.
Also if a rule can autofix a problem, it should tell that it could have been autofixed so at the summary it can indicate the number of autofixable problems.
Use cases
This would permit for some rules without important side effects to fix like
- attr-spacing
- no-dup-class