graft: drop --user and --date values info from hint in case of conflicts

After previous patch, we have started preserving user and date values in
graftstate and reusing them during `hg graft --continue`. Now passing --user and
--date again with --continue makes no sense. Let's drop them from the hint.

Differential Revision: https://phab.mercurial-scm.org/D3660

mercurial/commands.py

@@ -64,7 +64,6 b' from . import ('
 )
 from .utils import (
     dateutil,
-    procutil,
     stringutil,
 )
 
@@ -2365,10 +2364,6 b' def _dograft(ui, repo, *revs, **opts):'
                 stateversion = 1
                 graftstate.save(stateversion, statedata)
                 extra = ''
-                if opts.get('user'):
-                    extra += ' --user %s' % procutil.shellquote(opts['user'])
-                if opts.get('date'):
-                    extra += ' --date %s' % procutil.shellquote(opts['date'])
                 if opts.get('log'):
                     extra += ' --log'
                 hint=_("use 'hg resolve' and 'hg graft --continue%s'") % extra

tests/test-graft.t

@@ -1456,7 +1456,7 b' running `hg graft --continue`'
   merging b
   warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
-  (use 'hg resolve' and 'hg graft --continue --user batman')
+  (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ echo wat > b
@@ -1506,7 +1506,7 b' Test that --date is preserved and reused'
   merging b
   warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
-  (use 'hg resolve' and 'hg graft --continue --date '1234560000 120'')
+  (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ echo foobar > b