D464: editor: use an unambiguous path suffix for editor files

[durin42 (Augie Fackler)]

durin42 added inline comments.

INLINE COMMENTS

> yuja wrote in cmdutil.py:344
> Sorry for late review, but doesn't it change the suffix from
> `.diff` to `.diff.hg.txt`?

Argh, yes it does. @mbolin can you send a follow-up to fix that?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D464

To: mbolin, quark, durin42, #hg-reviewers, ryanmce
Cc: yuja, smf, ryanmce, mercurial-devel