Course format plugins are failing code checks (both GitHub CI and code prechecks) due to HTML tag trailing slashes in included Mustache files. See:
GitHub CI https://github.com/james-cnz/moodle-format_multitopic/actions/runs/5803629796/job/15732009471
Code prechecks https://moodle.org/plugins/format_multitopic/v4.2.3-rc1/29755?smurf=html#mustache

I think these are the relevant files:
course/format/templates/local/content/cm/bulkselect.mustache
course/format/templates/local/content/section/bulkselect.mustache

Really I think the problem is overly stringent checking, I don't think there's really anything wrong with HTML tag trailing slashes.  However, I've raised issues with the checkers, and aren't sure when or if it will be changed there. See:
https://github.com/moodlehq/moodle-local_ci/pull/274
https://tracker.moodle.org/browse/MDLSITE-7329

Removing the trailing slashes should resolve the issue, and it would be nice to be able to pass the checks again.

Cheers,
James