Updated mediawiki/extensions
Project: mediawiki/extensions/Parsoid  c8ff30bf0ae6cac56ba057cab156ec2837b8aa97
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Ignore about attribute in DOMDiff

The actual value of the about attribute can change between re-parses (and does
not matter as long as it is unique). Don't treat this as a content change in
the DOMDiff module.

Change-Id: I4d3ba8c2be3c32defa2dde7357203d23a3dc171e