revert: fix interactive reverting of end-of-file newline changes
The chunk reversal used by `revert -i` in Curses mode was not taking this case
into account.
Differential Revision: https://phab.mercurial-scm.org/D8762
phabricator: clarify the multiple heads/roots error message for phabsend
As pointed out in followup feedback for c1c922391314, it's confusing to say
there are multiple items and then only list one.
Differential Revision: https://phab.mercurial-scm.org/D8761