Visit https://www.mediawiki.org/w/index.php?title=Talk:Flow&workflow=050b94781344bd50ee7e782bcb087d2e and scroll to the new comment textarea.
It contains the placeholder
Comment on " I brought some kitties for the A team to pet!"
with a visible gap in Firefox and Chromium, because the leading spaces in the topic title aren't trimmed. In the normal topic title appearance and in Special:RecentChanges, the extra spaces aren't apparent due to HTML ignoring runs of whitespace or displaying as a single space. If only the placeholder text has this visible gap this seems like WONTFIX.
Version: master
Severity: trivial
URL: https://www.mediawiki.org/w/index.php?title=Talk:Flow&workflow=050b94781344bd50ee7e782bcb087d2e