319 

   320 Preserve extra dict (issue3430):

   321 

   322   $ hg branch a

   323   marked working directory as branch a

   324   (branches are permanent and global, did you want a bookmark?)

   325   $ echo a >> a

   326   $ hg ci -ma

   327   $ hg ci --amend -m "a'"

   328   saved backup bundle to $TESTTMP/.hg/strip-backup/167f8e3031df-amend-backup.hg

   329   $ hg log -r . --template "{branch}\n"

   330   a

   331   $ hg ci --amend -m "a''"

   332   saved backup bundle to $TESTTMP/.hg/strip-backup/ceac1a44c806-amend-backup.hg

   333   $ hg log -r . --template "{branch}\n"

   334   a

   335 

   336 Also preserve other entries in the dict that are in the old commit,

   337 first graft something so there's an additional entry:

   338 

   339   $ hg up 0 -q

   340   $ echo z > z

   341   $ hg ci -Am 'fork'

   342   adding z

   343   created new head

   344   $ hg up 11

   345   5 files updated, 0 files merged, 1 files removed, 0 files unresolved

   346   $ hg graft 12

   347   grafting revision 12

   348   $ hg ci --amend -m 'graft amend'

   349   saved backup bundle to $TESTTMP/.hg/strip-backup/18a5124daf7a-amend-backup.hg

   350   $ hg log -r . --debug | grep extra

   351   extra:       branch=a

   352   extra:       source=2647734878ef0236dda712fae9c1651cf694ea8a