histedit: drop --no-backup option

Dropping this option because now we have a better option
than passing --no-backup flag every time, now user can
set a config in hgrc:

[ui]
history-editing-backup = False

This config aims to operate on every history editing command and
it is still work in progress. As yuya suggessted it probably to
late to add full support this config, so making this as
an experimental config.

Differential Revision: https://phab.mercurial-scm.org/D3965

hgext/histedit.py

@@ -925,7 +925,6 b' def findoutgoing(ui, repo, remote=None, '
       _("don't strip old nodes after edit is complete")),
      ('', 'abort', False, _('abort an edit in progress')),
      ('o', 'outgoing', False, _('changesets not found in destination')),
-     ('', 'no-backup', False, _('do not save backup copies of files')),
      ('f', 'force', False,
       _('force outgoing even for unrelated repositories')),
      ('r', 'rev', [], _('first revision to be edited'), _('REV'))] +
@@ -1112,8 +1111,7 b' def _histedit(ui, repo, state, *freeargs'
     goal = _getgoal(opts)
     revs = opts.get('rev', [])
     # experimental config: ui.history-editing-backup
-    nobackup = (opts.get('no_backup') or
-                not ui.configbool('ui', 'history-editing-backup'))
+    nobackup = not ui.configbool('ui', 'history-editing-backup')
     rules = opts.get('commands', '')
     state.keep = opts.get('keep', False)
 

tests/test-histedit-no-backup.t

@@ -6,6 +6,9 b' Enable extension used by this test'
   > histedit=
   > EOF
 
+==========================================
+Test history-editing-backup config option|
+==========================================
 Repo setup:
   $ hg init foo
   $ cd foo
@@ -30,72 +33,6 b' Repo setup:'
   o  0   36b4bdd91f5b   1970-01-01 00:00 +0000   test
        one
   
-Check when --no-backup is not passed
-  $ hg histedit -r '36b4bdd91f5b' --commands - << EOF
-  > pick 36b4bdd91f5b 0 one
-  > pick 6153eb23e623 1 two
-  > roll 80d23dfa866d 2 three
-  > edit 7d5187087c79 3 four
-  > EOF
-  merging file
-  Editing (7d5187087c79), you may commit or record as needed now.
-  (hg histedit --continue to resume)
-  [1]
-
-  $ hg histedit --abort
-  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
-  saved backup bundle to $TESTTMP/foo/.hg/strip-backup/1d8f701c7b35-cf7be322-backup.hg
-  saved backup bundle to $TESTTMP/foo/.hg/strip-backup/5c0056670bce-b54b65d0-backup.hg
-
-  $ hg st
-  $ hg diff
-  $ hg log -G --style compact
-  @  3[tip]   7d5187087c79   1970-01-01 00:00 +0000   test
-  |    four
-  |
-  o  2   80d23dfa866d   1970-01-01 00:00 +0000   test
-  |    three
-  |
-  o  1   6153eb23e623   1970-01-01 00:00 +0000   test
-  |    two
-  |
-  o  0   36b4bdd91f5b   1970-01-01 00:00 +0000   test
-       one
-  
-
-Check when --no-backup is passed
-  $ hg histedit -r '36b4bdd91f5b' --commands - << EOF
-  > pick 36b4bdd91f5b 0 one
-  > pick 6153eb23e623 1 two
-  > roll 80d23dfa866d 2 three
-  > edit 7d5187087c79 3 four
-  > EOF
-  merging file
-  Editing (7d5187087c79), you may commit or record as needed now.
-  (hg histedit --continue to resume)
-  [1]
-
-  $ hg histedit --abort --no-backup
-  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
-
-  $ hg st
-  $ hg diff
-  $ hg log -G --style compact
-  @  3[tip]   7d5187087c79   1970-01-01 00:00 +0000   test
-  |    four
-  |
-  o  2   80d23dfa866d   1970-01-01 00:00 +0000   test
-  |    three
-  |
-  o  1   6153eb23e623   1970-01-01 00:00 +0000   test
-  |    two
-  |
-  o  0   36b4bdd91f5b   1970-01-01 00:00 +0000   test
-       one
-  
-==========================================
-Test history-editing-backup config option|
-==========================================
 Test when `history-editing-backup` config option is enabled:
   $ hg histedit -r '36b4bdd91f5b' --commands - << EOF
   > pick 36b4bdd91f5b 0 one