Updated mediawiki/extensions
Project: mediawiki/extensions/WebPlatformAuth  bf1b05f9f5b6b20f19ee063b3707787cc4689954

Consistency tweaks in preparation for adding extension to translatewiki.net

* Add newline at end of file to unbreak twn's scripts
* Remove . from end of description message
* Use template for extension description

Change-Id: Id1e25971481fc76cfc4fa5a04f7e39726a002599