Deployed uses outside of core:
- Wikibase RepoHooks::onPageHistoryLineEnding
- Thanks ThanksHooks::insertThankLink - handler for two hooks that will need to be replaced
In core:
- HistoryPager - https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/593620/
- DifferenceEngine - https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/593272/
- Article::showDeletedRevisionHeader - https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/593826/
- RevDelRevisionItem - https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/593620/
- RevisionItem::isDeleted - https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/593620/
- SpecialMergeHistory::formatRevisionRow - https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/593620/
- SpecialUndelete - https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/593620/
- DeletedContribsPager::formatRevisionRow - https://gerrit.wikimedia.org/r/#/c/mediawiki/core/+/593620/
In core tests: RevisionDbTest, RevisionTest