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

[mbolin (Michael Bolin)]

mbolin added a comment.


  Also, it looks like I would have to refactor `ui.edit()` quite a bit to create a unit test since the file name never escapes the method and that's what you would like me to verify, right?

REPOSITORY
  rHG Mercurial

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

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