I started this thread.
I filed this bug https://bugzilla.wikimedia.org/show_bug.cgi?id=42989 Gerrit: show link for raw file content in gerrit "diff" views (a solution is proposed inside) It has been closed as "RESOLVED INVALID" instead of deploying a solution to Gerrit.
As a solution of the problem (show a raw file content) has not been found (GitHub shows raw file contents, SVN browser ViewVC shows raw file contents) example https://svn.wikimedia.org/viewvc/mediawiki/trunk/extensions/AJAXPoll/AJAXPol...
I feel unhappy. Very unhappy.