D3901: histedit: add history-editing-backup config option

[yuja (Yuya Nishihara)]

yuja added a comment.


  Queued with some typo fixes, thanks.
  
  > Do I need to remove all the code related to --no-backup option?
  
  Yes. Remove handling of `opts.get('no_backup')`, and replace/remove tests
  with `--config ui.history-editing-backup=False`.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3901

To: khanchi97, durin42, #hg-reviewers
Cc: pulkit, yuja, mercurial-devel