D468: util: use ~ as a suffix for a temp file in the same directory as a source file

[smf (Sean Farley)]

smf added a comment.


  In https://phab.mercurial-scm.org/D468#7748, @durin42 wrote:
  
  > I don't object to this, but maybe others do. Reviewers not on vacation, please feel encouraged to push this.
  
  
  Well, I had some objections on the mailing list. It's sad that those don't show up in phabricator. Basically, I'd like a more unified approach for all types of temp files (commit message, histedit, conflicts, etc).

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D468

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