This is a continuation of T283327: Improve Phabricator translation synchronization process.
Every time message documentation is re-generated, all of message documentation shows as changed because there is trailing whitespace, which is not supported on translatewiki.net (because MediaWiki pages cannot have trailing whitespace).
Example:
"fcbde22d0f9ea64a": "Used in:\n\n[https://phabricator.wikimedia.org/source/phabricator/browse/wmf%252Fstable/src//applications/macro/controller/PhabricatorMacroViewController.php$161 PhabricatorMacroViewController.php:161]\n[https://phabricator.wikimedia.org/source/phabricator/browse/wmf%252Fstable/src//applications/macro/controller/PhabricatorMacroAudioController.php$101 PhabricatorMacroAudioController.php:101]\n"
Last \n is what causes trouble.