Remove useless comment and white spaces :scissors: [ci skip]
fix the typo [ci skip]

fix the typo newstopics => new topics in action view cache helper
Merge pull request #12105 from rajcybage/fixing_typo

fix the typo [ci skip]
Revert "Port all remaining self.protected_instance_variables to class methods"

This reverts commit 7de994fa215e9f4c2856d85034bc4dd7b65d0c01.
Return to using protected_instance_variables in AV
Merge pull request #12110 from strzalek/revert-default-protected-instance-vars

Revert default protected instance vars
Move skeleton methods from AV to AbsC

The methods:

 * #render_to_body
 * #render_to_string
 * #_normalize_render

Haven't had anything specyfic to ActionView. This was common code which should belong to AbstractController
Make Mime::TEXT default format in AbstractController
Move BasicRendering to AbstractController
Merge pull request #12121 from strzalek/move-methods-to-abs-controller

Move glue methods & BasicRendering to AbstractController
Revert "Merge pull request #12085 from valk/master"

This reverts commit 15455d76c8d33b3767a61e0cdd2de0ff592098ef, reversing
changes made to ffa56f73d5ae98fe0b8b6dd2ca6f0dffac9d9217.