Fixes a mistake in documentation for the AdminWidgetHook.
Review Request #6703 — Created Dec. 18, 2014 and submitted
The AdminWidget class does not exist yet it is used in the sample code. All references to it have been changed to the Widget class.
Built docs.
Tool: PEP8 Style Checker Ignored Files: docs/manual/extending/extensions/hooks/admin-widget-hook.rst Tool: Pyflakes Ignored Files: docs/manual/extending/extensions/hooks/admin-widget-hook.rst