phabricator: also check parent fctx for binary where it is checked for UTF-8...
phabricator: also check parent fctx for binary where it is checked for UTF-8
I don't know that this is necessary, but it seems obvious from the code checking
both the current and parent file for UTF-8 content that this was the intent.
Differential Revision:
https://phab.mercurial-scm.org/D8221
