[depot_tools] Removing unnecessary capturing regex.

presubmit_canned_checks.py

 # Copyright (c) 2012 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.
 
 """Generic presubmit checks that can be reused by other presubmit checks."""
 
 
 ### Description checks
 
 def CheckChangeHasTestField(input_api, output_api):
@@ skipping 838 matching lines @@
   text_files = tuple(text_files or (
       r'.+\.txt$',
       r'.+\.json$',
   ))
   project_name = project_name or 'Chromium'
   license_header = license_header or (
       r'.*? Copyright \(c\) %(year)s The %(project)s Authors\. '
         r'All rights reserved\.\n'
       r'.*? Use of this source code is governed by a BSD-style license that '
         r'can be\n'
-      r'.*? found in the LICENSE file\.( \*/)?\n'
+      r'.*? found in the LICENSE file\.(?: \*/)?\n'
   ) % {
       'year': input_api.time.strftime('%Y'),
       'project': project_name,
   }
 
   results = []
   # This code loads the default black list (e.g. third_party, experimental, etc)
   # and add our black list (breakpad, skia and v8 are still not following
   # google style and are not really living this repository).
   # See presubmit_support.py InputApi.FilterSourceFile for the (simple) usage.
@@ skipping 44 matching lines @@
     results.extend(input_api.canned_checks.CheckSvnForCommonMimeTypes(
         input_api, output_api))
     snapshot("checking license")
     results.extend(input_api.canned_checks.CheckLicense(
         input_api, output_api, license_header, source_file_filter=sources))
     snapshot("checking was uploaded")
     results.extend(input_api.canned_checks.CheckChangeWasUploaded(
         input_api, output_api))
   snapshot("done")
   return results