[PATCH 3 of 5 v4] rebase: suggest the correct tool to continue (not rebase)

[timeless]

# HG changeset patch
# User timeless <timeless at mozdev.org>
# Date 1454557598 0
#      Thu Feb 04 03:46:38 2016 +0000
# Node ID 9c8776f1fc9459a867bcf59b0180a29ffec81e06
# Parent  3f9f1a901281a14ac336d340bc597485629a4daa
rebase: suggest the correct tool to continue (not rebase)

Suggest committing (or whatever the current activity is), via
wrongtooltocontinue which uses howtocontinue.

diff --git a/hgext/rebase.py b/hgext/rebase.py
--- a/hgext/rebase.py
+++ b/hgext/rebase.py
@@ -915,7 +915,7 @@
     except IOError as err:
         if err.errno != errno.ENOENT:
             raise
-        raise error.Abort(_('no rebase in progress'))
+        cmdutil.wrongtooltocontinue(repo, _('rebase'))
 
     if keepbranches is None:
         raise error.Abort(_('.hg/rebasestate is incomplete'))
diff --git a/tests/test-rebase-parameters.t b/tests/test-rebase-parameters.t
--- a/tests/test-rebase-parameters.t
+++ b/tests/test-rebase-parameters.t
@@ -495,6 +495,10 @@
   $ hg resolve -m c2
   (no more unresolved files)
   continue: hg rebase --continue
+  $ hg graft --continue
+  abort: no graft in progress
+  (continue: hg rebase --continue)
+  [255]
   $ hg rebase -c --tool internal:fail
   rebasing 2:e4e3f3546619 "c2b" (tip)
   note: rebase of 2:e4e3f3546619 created no changes to commit