Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  e20877f46d52d043831be59f17a06672fa00f204

Fix missing fn JS error in IE (trim)

http://kangax.github.io/compat-table/es5/#String.prototype.trim
Change-Id: Ia9c56c3c1a949744da6b0175302935a9ea263927