Fixed #23313 -- Corrected repr(RawQuery) with dict parameters.
Clarified a comment in django.core.files.temp.
Removed unnecessary release notes for django.utils.translation.override().

Undocumented functions don't need to be mentioned.
Fixed #21201 -- Improved customization of ClearableFileInput.
Fixed flake8 warning.
Fixed #21483 -- Added WSGI environ to kwargs sent to request_started signal.
Fixed a typo in the 1.8 release notes.