diff -r 667e88568087 -r 089e37802fb3 mercurial/parser.py
--- a/mercurial/parser.py	Sun Mar 12 00:44:21 2017 -0500
+++ b/mercurial/parser.py	Sun Mar 12 00:44:59 2017 -0500
@@ -265,7 +265,7 @@
     """Compose error message from specified ParseError object
     """
     if len(inst.args) > 1:
-        return _('at %s: %s') % (inst.args[1], inst.args[0])
+        return _('at %d: %s') % (inst.args[1], inst.args[0])
     else:
         return inst.args[0]