From 7ce385b6f8078354a7473c7af25b96c820b4c76f Mon Sep 17 00:00:00 2001
From: Valentin Lorentz <progval@progval.net>
Date: Mon, 28 Dec 2015 20:01:17 +0100
Subject: [PATCH] Don't substitude in errorInvalid. Closes GH-49.

Why was it doing substitutions in the first place?
---
 src/callbacks.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/callbacks.py b/src/callbacks.py
index 4a109f3bf..74d1041d8 100644
--- a/src/callbacks.py
+++ b/src/callbacks.py
@@ -549,7 +549,9 @@ class RichReplyMethods(object):
             v = _('That\'s not a valid %s.') % what
         if 'Raise' not in kwargs:
             kwargs['Raise'] = True
-        return self._error(self.__makeReply(v, s), **kwargs)
+        if s:
+            v += ' ' + s
+        return self._error(v, **kwargs)
 
 _repr = repr