Updated mediawiki/extensions
Project: mediawiki/extensions/Diff  a0eef62475dbe5cd6aefb0752d9875913c1cf8ad
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(bug 43990) Object conversion for diff arrayalisation.

This adds a way to convert objects to and from arrays on the fley,
so they can be used in an array representation of a diff.

This would allow us to implement I9fd62298 more imply and elegantly.

Change-Id: I0728282d16e093ccb202471da701fa44b78e991f