Question!
Hi. Reason for the move was https://gerrit.wikimedia.org/r/#/c/254041/ . It moved code from the VE extension to the Cite extension and the message keys were changed. In a follow up the existing translations were moved here on translatewiki.net to the new message keys.
Such moves happen a few times per week. Either a key change inside an extension or a move between two extensions. I am doing the followup moves/edits here so that our translators have less work. Hard to say how to avoid this... I guess most programmers are not aware the a key change can destroy a help page on MediaWiki.org.
ReplaceText: I think the extension needs a WMF security review first before it can be deployed at least on mw.org.
have a nice week too :-)
Oh, I'm sure they have good reasons to change the messages and only do that when really necessary. I'm wondering whether we can improve the process so that it creates less work for everyone. I'm going to throw this info into Phab ;) TTYS!