Updated mediawiki/extensions
Project: mediawiki/extensions/VisualEditor  ba90be7d7ad02e0966b5e8fe3495c1b761665fb1

[browser test] Headings now include a buffer space

Confirmed with James F that this was an intentional Parsoid
change (and not a bug).

Change-Id: I21d7eba4675eaf7250267003516585e96069b4e6