D388: filemerge: extract _maketemp and _makebackup

[martinvonz (Martin von Zweigbergk)]

martinvonz added a comment.


  In https://phab.mercurial-scm.org/D388#9515, @phillco wrote:
  
  > (Fixed trailing space)
  
  
  Yep, I saw that in tests and fixed it locally, so you'll probably see divergence when you pull after I've pushed them.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D388

To: phillco, #hg-reviewers
Cc: martinvonz, mercurial-devel