User blog comment:Kirkburn/Technical Update: October 26, 2015/@comment-8865495-20151027223835/@comment-126761-20151027233935

The preference now applies to all syntax highlighted editor situations - Help:Syntax highlighting has been updated to reflect this.

The highlighter that started on portable infobox edit pages is particularly good at highlighting HTML code, which is often used in templates. These tweaks are all iterative, so we'd love feedback on them.