"up-to-date" should only use hyphens when used as compound modifier of a noun

chrome/common/extensions/docs/server2/caching_file_system.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.
 
 import logging
 import posixpath
 import sys
 
 from file_system import FileSystem, StatInfo, FileNotFoundError
 from future import All, Future
@@ skipping 114 matching lines @@
 
     if skip_not_found:
       # Filter out paths which we know do not exist, i.e. if |path| is in
       # |cached_read_values| *and* has a None version, then it doesn't exist.
       # See the above declaration of |cached_read_values| for more information.
       paths = [path for path in paths
                if cached_read_values.get(path, (None, True))[1]]
 
     remaining_paths = set(paths) - set(up_to_date_data.iterkeys())
     if len(remaining_paths) == 0:
-      # Everything was cached and up-to-date.
+      # Everything was cached and up to date.
       return Future(value=up_to_date_data)
 
     def raise_cache_miss(paths):
       raise FileNotFoundError('Got cache miss when trying to stat %s' % paths)
 
     if self._fail_on_miss:
       # Ignore missing values and return anyway.
       logging.warn('Read cache miss for %s on %s' %
                    (remaining_paths, self.GetIdentity()))
       return Future(callback=lambda: raise_cache_miss(remaining_paths))
@@ skipping 44 matching lines @@
     return self._file_system.Walk(root, depth=depth, file_lister=file_lister)
 
   def GetIdentity(self):
     return self._file_system.GetIdentity()
 
   def GetVersion(self):
     return self._file_system.GetVersion()
 
   def __repr__(self):
     return '%s of <%s>' % (type(self).__name__, repr(self._file_system))