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Update Wikidata - Fix autocomment format and change coalescing bugs

Description

Update Wikidata - Fix autocomment format and change coalescing bugs

Also remove deprecated code in ApiXmlFormatTest. It is safe to
remove now, but when this branch is tested with the next MW core
branch, then the deprecation warning will cause jenkins to fail.

Change-Id: I5d2475797e599351d2baf02b0a33c5f3c21c2740