graft: fix formatting of message

mercurial/commands.py

@@ -2560,7 +2560,7 b' def graft(ui, repo, *revs, **opts):'
 
     for pos, ctx in enumerate(repo.set("%ld", revs)):
         current = repo['.']
-        ui.status('grafting revision %s', ctx.rev())
+        ui.status('grafting revision %s\n' % ctx.rev())
 
         # we don't merge the first commit when continuing
         if not cont: