Updated mediawiki/extensions
Project: mediawiki/extensions/VisualEditor  7c1ba7750c36e58fc79f15be75aec48e113482c8

Minor doc fixes to `ve.dm.Transaction`.

Correct the return value descriptions for the `newFromMetadataInsertion` and
`newFromMetadataRemoval` methods (which appear to have been cut-and-pasted
from another method).

Change-Id: I019b0ef9c75ff47fc0f2df8c95da9d090710a5a8