Suggest improvement to [[MediaWiki:Showdiff/en]]

Apparently a [[phab:|Phabricator task]] would be necessary to make the change, if a consensus can even be reached about this, since English messages cannot be translated here, as alluded to ("one of the developers at the project concerned will change the message") at [[FAQ#Improving the English source message]]. I don't think this is actually the best place to discuss such a change. Try [[Translating talk:MediaWiki]] instead.