A ricochet from fixing #10680: http://http://example.com/ no longer reports

'nonnumeric port'. It parses to a host name of "http:" which is equivalent to
http:80.

Lib/packaging/tests/test_pypi_simple.py

@@ -87,7 +87,7 @@ class SimpleCrawlerTestCase(TempdirManager,
         try:
             crawler._open_url(url)
         except Exception as v:
-            self.assertIn('nonnumeric port', str(v))
+            self.assertIn('Download error', str(v))
 
         # issue #160
         url = server.full_address