Update CHANGES.txt

CHANGES.txt

@@ -4,6 +4,10 @@ Unreleased
Backwards Incompatibility
~~~~~~~~~~~~~~~~~~~~~~~~~

- Response `__init__` will no longer set the default Content-Type, nor
  Content-Length on Responses that don't have a body. This allows WebOb to
  return proper responses for things like `Response(status='204 No Content')`.

- Response.text will no longer raise if the Content-Type does not have a
  charset, it will fall back to using the new default_body_encoding. To get the
  old behaviour back please sub-class Response and set default_body_encoding to
@@ -53,12 +57,13 @@ Bugfix
- Response.json's json.dumps/loads are now always UTF-8. It no longer tries to
  use the charset.

- Response.__init__ will no longer set the default Content-Type on Responses
  that have no body and thus shouldn't have a Content-Type
- Response `__init__` will no longer set the default Content-Type, nor
  Content-Length on Responses that don't have a body. This allows WebOb to
  return proper responses for things like `Response(status='204 No Content')`.

- The Response `__init__` will by default no longer set the Content-Type to the
  default if a headerlist is provided. This fixes issues whereby
  Request.get_response() would return a Response that didn't match the actual
  `Request.get_response()` would return a Response that didn't match the actual
  response.
  See https://github.com/Pylons/webob/pull/261 and
  https://github.com/Pylons/webob/issues/205