filemerge: add support for change/delete conflicts to the ':prompt' tool

We haven't added the 'leave unresolved' option yet -- that will come in a
future patch.

mercurial/filemerge.py

@@ -221,6 +221,19 b' def _iprompt(repo, mynode, orig, fcd, fc'
     fd = fcd.path()
 
     try:
+        if fco.isabsent():
+            index = ui.promptchoice(
+                _("local changed %s which remote deleted\n"
+                  "use (c)hanged version or (d)elete?"
+                  "$$ &Changed $$ &Delete") % fd, 0)
+            choice = ['local', 'other'][index]
+        elif fcd.isabsent():
+            index = ui.promptchoice(
+                _("remote changed %s which local deleted\n"
+                  "use (c)hanged version or leave (d)eleted?"
+                  "$$ &Changed $$ &Deleted") % fd, 0)
+            choice = ['other', 'local'][index]
+        else:
         index = ui.promptchoice(_("no tool found to merge %s\n"
                                   "keep (l)ocal or take (o)ther?"
                                   "$$ &Local $$ &Other") % fd, 0)