Updated mediawiki/extensions
Project: mediawiki/extensions/Math  8afccbe8883b1aab8566265c32e1522255096898

(bug 36855) escape literal % in tex input

This removes support for MathML % comments, just as with texvc

PS2: Fix for regex lookbehind issue

Change-Id: I0cb026d749733ed3dbba8faacb163be4438fc6bb