message: Fix misc. style issues
diff: @@ -41,6 +41,7 @@ class S3Cache(BaseCache):
  def get(self, key):
  """Look up key in the cache and return the value for it.
  +
  :param key: the key to be looked up.
  :returns: The value if it exists and is readable, else ``None``.
  """
  @@ -64,6 +65,7 @@ class S3Cache(BaseCache):
  def delete(self, key):
  """Delete `key` from the cache.
  +
  :param key: the key to delete.
  :returns: Whether the key existed and has been deleted.
  :rtype: boolean
  @@ -72,7 +74,7 @@ class S3Cache(BaseCache):
  return False
  else:
  try:
  - response = self.s3_client.delete_objects(
  + self.s3_client.delete_objects(
  Bucket=self.bucket,
  Delete={
  'Objects': [
  @@ -89,8 +91,10 @@ class S3Cache(BaseCache):
  return True
  def set(self, key, value, timeout=None):
  - """Add a new key/value to the cache (overwrites value, if key already
  - exists in the cache).
  + """Add a new key/value to the cache.
  +
  + If the key already exists, the existing value is overwritten.
  +
  :param key: the key to set
  :param value: the value for the key
  :param timeout: the cache timeout for the key in seconds (if not
  @@ -118,8 +122,8 @@ class S3Cache(BaseCache):
  return True
  def add(self, key, value, timeout=None):
  - """Works like :meth:`set` but does not overwrite the values of already
  - existing keys.
  + """Works like :meth:`set` but does not overwrite existing values.
  +
  :param key: the key to set
  :param value: the value for the key
  :param timeout: the cache timeout for the key in seconds (if not
  @@ -135,8 +139,9 @@ class S3Cache(BaseCache):
  return self.set(key, value, timeout=timeout)
  def clear(self):
  - """Clears the cache. Keep in mind that not all caches support
  - completely clearing the cache.
  + """Clears the cache.
  +
  + Keep in mind that not all caches support completely clearing the cache.
  :returns: Whether the cache has been cleared.
  :rtype: boolean
  """
  @@ -153,7 +158,7 @@ class S3Cache(BaseCache):
  Bucket=self.bucket,
  Key=self._full_s3_key(key)
  )
  - except Exception as e:
  + except Exception:
  # head_object throws an exception when object doesn't exist
  return False
  else:
  