A quick hack to make the test pass on the Mac (similar to the quick hack
to make it pass on Windows:-).
diff --git a/Lib/test/test_urllib2.py b/Lib/test/test_urllib2.py
index 80356f8..5b4c68c 100644
--- a/Lib/test/test_urllib2.py
+++ b/Lib/test/test_urllib2.py
@@ -15,6 +15,10 @@
 fname = os.path.abspath(urllib2.__file__).replace('\\', '/')
 if fname[1:2] == ":":
     fname = fname[2:]
+# And more hacking to get it to work on MacOS. This assumes
+# urllib.pathname2url works, unfortunately...
+if os.name == 'mac':
+	fname = '/' + fname.replace(':', '/')
 file_url = "file://%s" % fname
 f = urllib2.urlopen(file_url)