**Feature summary** (what you would like to be able to do and where):
* add `<sh>` for `<syntaxhighlight>` (multi-line code)
* add `<shi>` for `<syntaxhighlight inline>` (single line code)
**Use case(s)** (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
**Benefits** (why should this be implemented?):
* `<syntaxhighlight>`, `<syntaxhighlight inline>`, and `<code><nowiki>` are laborious to type, providing a poor experience for technical contributors trying to type code on wiki pages
* There's folks that go around patrolling the category https://en.wikipedia.org/wiki/Category:Pages_with_syntax_highlighting_errors and putting pressure on folks to always add `lang="abc"` to `<syntaxhighlight>` tags, making the typical tag length even longer. So for example I find myself typing very long things like `<syntaxhighlight inline lang="js">`.
**Other**
* Something more industry standard like triple backtick (`````````) and backtick (```) would risk false positives with existing code, and would require a much more complicated patch that fundamentally changes wikicode syntax
* Related:
* {T311518}
* {T217944}