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Enable new heading HTML by default
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Description

The changes implemented in T13555: .mw-editsection links should not be part of the <h#> element (see "Heading HTML changes") are not enabled by default in MediaWiki 1.43, and have to be opted into by site administrators by setting $wgParserEnableLegacyHeadingDOM = false.

As documented in the release notes at the time, and on that documentaton page, in a future release we should make them enabled by default, and change the config setting to be an opt-out. This is tentatively planned for MediaWiki 1.44.

Details

Event Timeline

Change #1023980 had a related patch set uploaded (by Bartosz Dziewoński; author: Bartosz Dziewoński):

[mediawiki/core@master] Enable new heading HTML by default

https://gerrit.wikimedia.org/r/1023980

Change #1023980 merged by jenkins-bot:

[mediawiki/core@master] Enable new heading HTML by default

https://gerrit.wikimedia.org/r/1023980

matmarex claimed this task.

Next step is to remove the option entirely – this should happen in T371756, planned for MW 1.45.