|mediawiki/core : master||ApiComparePages: Update for MCR|
|mediawiki/core : master||ApiComparePages: Add 'fromsection' and 'tosection' parameters|
After further consideration, this was a bad idea. We should have had fromsection and tosection work more like the section parameter to action=edit, expanding the fromtext/totext as if for a section edit and then doing a whole-page diff as requested in T185723: Compare full pages at section API diffs.
Since T174032: Make relevant API modules aware of MCR means we have to deprecate fromsection and tosection anyway in favor of per-slot versions, I'm going to have the new per-slot versions have the expansion behavior instead of the extraction behavior requested here.