PR: Fix build.

Author: Poogles

google_auth_httplib2.py

@@ -25,7 +25,7 @@
 # httplib became http.client in 3.x
 try:
     from http.client import HTTPException
-except ImportError:
+except ImportError:  # pragma: no cover
     from httplib import HTTPException
 
 _LOGGER = logging.getLogger(__name__)
@@ -120,7 +120,7 @@ def __call__(self, url, method='GET', body=None, headers=None,
             response, data = self.http.request(
                 url, method=method, body=body, headers=headers, **kwargs)
             return _Response(response, data)
-        # TODO: httplib2 should catch the lower http error, this is a bug and
+        # httplib2 should catch the lower http error, this is a bug and
         # needs to be fixed there.  Catch the error for the meanwhile.
         except (httplib2.HttpLib2Error, HTTPException) as exc:
             raise exceptions.TransportError(exc)