Change logging statements to not use the "%" operator.

third_party/WebKit/Tools/Scripts/webkitpy/common/net/rietveld.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Utility functions to communicate with Rietveld."""
 
 import collections
 import json
 import logging
 import urllib2
@@ skipping 47 matching lines @@
 def _get_json(url, web):
     """Fetches JSON from a URL, and logs errors if the request was unsuccessful.
 
     Raises:
         urllib2.URLError: Something went wrong with the request.
         ValueError: The response wasn't valid JSON.
     """
     try:
         contents = web.get_binary(url)
     except urllib2.URLError:
-        _log.error('Request failed to URL: %s' % url)
+        _log.error('Request failed to URL: %s', url)
         raise
     try:
         return json.loads(contents)
     except ValueError:
-        _log.error('Invalid JSON: %s' % contents)
+        _log.error('Invalid JSON: %s', contents)
         raise
 
 
 def _issue_url(issue_number):
     return '%s/%s' % (BASE_CODEREVIEW_URL, issue_number)
 
 
 def _patchset_url(issue_number, patchset_number):
     return '%s/%s' % (_issue_url(issue_number), patchset_number)
 
@@ skipping 15 matching lines @@
     return [j for j in jobs if builder_to_highest_number[j.builder_name] == j.build_number]
 
 
 def get_latest_try_job_results(issue_number, web):
     url = _latest_patchset_url(issue_number, web)
     patchset_data = _get_json(url, web)
     results = {}
     for job in patchset_data['try_job_results']:
         results[job['builder']] = job['result']
     return results