test-url: remove trailing whitespace

tests/test-url.py

@@ -9,7 +9,7 b' def cert(cn):'
 
 from mercurial.url import _verifycert
 
-# Test non-wildcard certificates        
+# Test non-wildcard certificates
 check(_verifycert(cert('example.com'), 'example.com'),
       None)
 check(_verifycert(cert('example.com'), 'www.example.com'),