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When I renamed a JRuby file using the "rename" utility from the right click menu the file was renamed but the comment at the top of the file was not. It would be nice if this worked in the same way as Java refectoring with the option being given to "apply to comments".
Rename refactoring is implemented for Ruby now, but unlike Java, Ruby classes do not have any specific filename requirements (in Java they are 1-1), so refactoring does not affect file names or vice versa. Arguably if the filename reflects the class in some way (such as FooController in foo_controller.rb) it could offer to rename the file, and in those cases renaming the file could also offer to refactor the class.
Reassigning this issue to newly created 'ruby' component.