Merged revisions 77727 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r77727 | ezio.melotti | 2010-01-24 18:58:36 +0200 (Sun, 24 Jan 2010) | 1 line

  use assert[Not]IsInstance where appropriate
........
diff --git a/Lib/test/test_wsgiref.py b/Lib/test/test_wsgiref.py
index ab6096a..b78d0c8 100755
--- a/Lib/test/test_wsgiref.py
+++ b/Lib/test/test_wsgiref.py
@@ -211,12 +211,12 @@
         # Check defaulting when empty
         env = {}
         util.setup_testing_defaults(env)
-        if isinstance(value,StringIO):
-            self.assertTrue(isinstance(env[key],StringIO))
+        if isinstance(value, StringIO):
+            self.assertIsInstance(env[key], StringIO)
         elif isinstance(value,BytesIO):
-            self.assertTrue(isinstance(env[key],BytesIO))
+            self.assertIsInstance(env[key],BytesIO)
         else:
-            self.assertEqual(env[key],value)
+            self.assertEqual(env[key], value)
 
         # Check existing value
         env = {key:alt}