mozilla/kuma — pull request #2645 by vrubiolo (2014-08-11 05:58:29+00:00)
Title: Fix 'Basics of HTML' broken link

The original link pointing to the Opera dev website was broken as the
document has been moved to the Webplatform site instead.

This commit fixes the link accordingly (reverts d8b7b8042c5 which removed
it entirely).