MediaWiki:Apihelp-compare-paramvalue-prop-comment
The comment on the 'from' and 'to' revisions. If the comment has been revision deleted, a fromcommenthidden or tocommenthidden property will be returned.
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The comment on the 'from' and 'to' revisions. If the comment has been revision deleted, a fromcommenthidden or tocommenthidden property will be returned.