graft: fix the help text to say `graft reapplies previous options`

graft: fix the help text to say `graft reapplies previous options`

The options which graft accepts are:

  * rev
  * continue
  * edit
  * log
  * force
  * currentdate
  * currentuser
  * date
  * user
  * tool
  * dryrun

Out of these following should be reapplied in case conflicts occur and user does
`hg graft --continue`:

  * rev
  * log
  * force
  * currentuser
  * currentdate
  * date
  * user

rev and force were already reapplied by --continue. Some recent refactors made
graft to store the values of other options in graftstate and reapplies them at
`hg graft --continue`.

Now all the options which should be reapplied are taken care of, we can easily
remove the help note which says that `--continue does not reapply earlier
options` and help text saying that we reapplies earlier options.

..  feature:: `hg graft --continue` now reapplies all the earlier options

    `hg graft` now preserves the value of all the flags and reapplies them in
    case of `hg graft --continue`.

Differential Revision: https://phab.mercurial-scm.org/D3667

--- a/mercurial/commands.py	Mon Jun 11 10:09:35 2018 -0700
+++ b/mercurial/commands.py	Tue Jun 12 02:36:34 2018 +0530
@@ -2161,10 +2161,7 @@
     Once all conflicts are addressed, the graft process can be
     continued with the -c/--continue option.
 
-    .. note::
-
-       The -c/--continue option does not reapply earlier options, except
-       for --force, --user and --date.
+    The -c/--continue option reapplies all the earlier options.
 
     .. container:: verbose