From ec2ce9bbaeb9d21fe0390fea7dca8e04be526a23 Mon Sep 17 00:00:00 2001
From: Nick Coghlan <ncoghlan@gmail.com>
Date: Fri, 27 Jul 2007 10:36:30 +0000
Subject: [PATCH] Make test_math error messages more meaningful for small
 discrepancies in results

---
 Lib/test/test_math.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py
index 699c621bcc..d86298d01b 100644
--- a/Lib/test/test_math.py
+++ b/Lib/test/test_math.py
@@ -12,7 +12,11 @@ class MathTests(unittest.TestCase):
 
     def ftest(self, name, value, expected):
         if abs(value-expected) > eps:
-            self.fail('%s returned %f, expected %f'%\
+            # Use %r instead of %f so the error message
+            # displays full precision. Otherwise discrepancies
+            # in the last few bits will lead to very confusing
+            # error messages
+            self.fail('%s returned %r, expected %r' %
                       (name, value, expected))
 
     def testConstants(self):
-- 
2.50.1