status: remove "morestatus" message from formatter data (BC)

They are just printable messages, not data that should be fed to JSON or
templater.

mercurial/cmdutil.py

@@ -654,16 +654,15 b' def morestatus(repo, fm):'
     statetuple = _getrepostate(repo)
     label = 'status.morestatus'
     if statetuple:
-        fm.startitem()
         state, statedetectionpredicate, helpfulmsg = statetuple
         statemsg = _('The repository is in an unfinished *%s* state.') % state
-        fm.write('statemsg', '%s\n',  _commentlines(statemsg), label=label)
+        fm.plain('%s\n' % _commentlines(statemsg), label=label)
         conmsg = _conflictsmsg(repo)
         if conmsg:
-            fm.write('conflictsmsg', '%s\n', conmsg, label=label)
+            fm.plain('%s\n' % conmsg, label=label)
         if helpfulmsg:
             helpmsg = helpfulmsg()
-            fm.write('helpmsg', '%s\n', helpmsg, label=label)
+            fm.plain('%s\n' % helpmsg, label=label)
 
 def findpossible(cmd, table, strict=False):
     """

tests/test-conflict.t

@@ -69,11 +69,6 b''
    {
     "path": "a.orig",
     "status": "?"
-   },
-   {
-    "conflictsmsg": "# Unresolved merge conflicts:\n# \n#     a\n# \n# To mark files as resolved:  hg resolve --mark FILE\n",
-    "helpmsg": "# To continue:    hg commit\n# To abort:       hg merge --abort\n",
-    "statemsg": "# The repository is in an unfinished *merge* state.\n"
    }
   ]