Support comments and blank lines in SUPPRESSIONS file

testing/tools/run_corpus_tests.py

 #!/usr/bin/env python
 # Copyright 2015 The PDFium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import optparse
 import os
 import re
 import subprocess
 import sys
@@ skipping 69 matching lines @@
     pdfium_test_path = pdfium_test_path + '.exe'
     pdfium_diff_path = pdfium_diff_path + '.exe'
   # TODO(tsepez): Mac may require special handling here.
 
   # Place generated files under the build directory, not source directory.
   working_dir = os.path.join(build_dir, 'gen', 'pdfium', 'testing', 'corpus')
   if not os.path.exists(working_dir):
     os.makedirs(working_dir)
 
   with open(os.path.join(testing_dir, 'SUPPRESSIONS')) as f:
-    suppression_list = [x.strip() for x in f.readlines()]
+    suppression_list = [y for y in [
+      x.split('#')[0].strip() for x in f.readlines()] if y]
 
   # test files are under .../pdfium/testing/corpus.
   failures = []
   walk_from_dir = os.path.join(testing_dir, 'corpus');
   input_file_re = re.compile('^[a-zA-Z0-9_.]+[.]pdf$')
   for source_dir, _, filename_list in os.walk(walk_from_dir):
     for input_filename in filename_list:
       if input_file_re.match(input_filename):
          input_path = os.path.join(source_dir, input_filename)
          if os.path.isfile(input_path):
            if input_filename in suppression_list:
              print "Not running %s, found in SUPPRESSIONS file" % input_filename
              continue
          if not test_one_file(input_filename, source_dir, working_dir,
                                 pdfium_test_path, pdfium_diff_path):
              failures.append(input_path)
 
   if failures:
     print '\n\nSummary of Failures:'
     for failure in failures:
       print failure
     return 1
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())