It fixes the indentation of `restore_object()` in the section "Specifying which fields should be write-only" serializers documentation.

Refactor UpdateModelMixin.update

Reduce nesting, return early in error cases.

Update throttling.md

Added comma to make DEFAULT_THROTTLE_CLASSES a tuple in example, for copy&paste to work nicely.

Minor typos fixed in api-guide/testing.md (request -> response).

Add myself into credits.md

update regex for matching URLs, fixes issue #1386

Fixed Testing docs section

Closes #1210. 

Test and quick fix for #1257

Update Exceptions Documentation

* regex for matching URLs was rewritten
* added unittests

Generate random token directly

Fixed a bug backticks

fix

    you may optionally exclude the ``self.check_object_permissions, and simply return the object from the `get_object_or_404` lookup.

to

    you may optionally exclude the `self.check_object_permissions`, and simply return the object from the `get_object_or_404` lookup.

Fixes typo (Implicit instead of Implict).

Viewsets docs typo

The docstring in the example said "update" instead of "create".

fixed typo (wrong "its")

just little bit modify