Updated mediawiki/extensions
Project: mediawiki/extensions/HSTS  3e92e20d8ce3aad451ff5e6f2c1df485fec15f05

Consistency tweaks in preparation for adding extension to translatewiki.net

* Change description message key for code convention
* Kill trailing spaces

Change-Id: If873bb7e52c32edf99ae6615519ceb7dbce1caf1