Show full diff in tests

Signed-off-by: Filipe Laíns <lains@riseup.net>

Author: FFY00

Lib/test/test_sysconfig.py

@@ -41,6 +41,7 @@ class TestSysConfig(unittest.TestCase):
 
     def setUp(self):
         super(TestSysConfig, self).setUp()
+        self.maxDiff = None
         self.sys_path = sys.path[:]
         # patching os.uname
         if hasattr(os, 'uname'):