From 2e814b3d8205d097d72860ba1e3632fc6e1499e3 Mon Sep 17 00:00:00 2001
From: Olivier Harris <o.harris@kabucreative.com.au>
Date: Wed, 16 Oct 2013 22:54:57 +1100
Subject: [PATCH] Fixed assertion error message

---
 pandas/core/generic.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pandas/core/generic.py b/pandas/core/generic.py
index 4dfe0a55fce28..bc5d84b9ff0f5 100644
--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -2828,7 +2828,7 @@ def truncate(self, before=None, after=None, copy=True):
         if before is not None and after is not None:
             if before > after:
                 raise AssertionError('Truncate: %s must be after %s' %
-                                     (before, after))
+                                     (after, before))
 
         result = self.ix[before:after]