Cleanup pylint errors

pylib/gyp/MSVSVersion.py

 # Copyright (c) 2013 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Handle version information related to Visual Stuio."""
 
 import errno
 import os
 import re
 import subprocess
@@ skipping 120 matching lines @@
   # Obtain the stdout from reg.exe, reading to the end so p.returncode is valid
   # Note that the error text may be in [1] in some cases
   text = p.communicate()[0]
   # Check return code from reg.exe; officially 0==success and 1==error
   if p.returncode:
     return None
   return text
 
 
 def _RegistryQuery(key, value=None):
-  """Use reg.exe to read a particular key through _RegistryQueryBase.
+  r"""Use reg.exe to read a particular key through _RegistryQueryBase.
 
   First tries to launch from %WinDir%\Sysnative to avoid WoW64 redirection. If
   that fails, it falls back to System32.  Sysnative is available on Vista and
   up and available on Windows Server 2003 and XP through KB patch 942589. Note
   that Sysnative will always fail if using 64-bit python due to it being a
   virtual directory and System32 will work correctly in the first place.
 
   KB 942589 - http://support.microsoft.com/kb/942589/en-us.
 
   Arguments:
@@ skipping 268 matching lines @@
   versions = _DetectVisualStudioVersions(version_map[version], 'e' in version)
   if not versions:
     if not allow_fallback:
       raise ValueError('Could not locate Visual Studio installation.')
     if version == 'auto':
       # Default to 2005 if we couldn't find anything
       return _CreateVersion('2005', None)
     else:
       return _CreateVersion(version, None)
   return versions[0]