Move docs folder to man.

man/src/filter_demo_output.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 import collections
 import os
 import re
 import sys
 
@@ skipping 119 matching lines @@
         for _ in xrange(callouts[i]):
           ext += '  <emphasis role="strong">(%d)</emphasis>' % callout_counter
           callout_counter += 1
         w(line + ext + '\n')
     if in_code:
       w(postamble)
 
 
 if __name__ == '__main__':
   main()