Openui5: Demo Kit: migrate to another syntax highlighter

[boghyon]

The code prettifier _Prettify_ is frequently used in UI5, mainly for the Demo Kit. But:

• The project has been abandoned, officially since April: https://github.com/googlearchive/code-prettify/commit/e006587b4a893f0281e9dc9a53001c7ed584d4e7
• The issue https://github.com/googlearchive/code-prettify/issues/563 has never been fixed. Consequently, many XML code snippets keep displaying the broken highlight. E.g.:
  

One of the alternatives is highlight.js.

• It's actively maintained.
• Stack Overflow recently moved to highlight.js.
• According to their performance benchmark, highlight.js scored better than Prettify consistently across all browsers.
• Can be used in a worker thread, as a ES6 module, and in NodeJS.
• It does a good job at what it's supposed to do - highlighting:
  

Surely there are also other tools which could replace Prettify. Anyhow, switching to a "better" highlighter, that actually works, would improve the quality of the documentation of UI5.

[tsanislavgatev]

Hello @boghyon ,
Thank you for sharing your enhancement proposal. I've created an internal incident 2070325863. The status of the issue will be updated here in GitHub.

Regards,
Tsanislav

[jdichev]

Hello, we will open an internal development task to migrate the syntax highlighter although I cannot promise it will be 100% highlight.js.

[boghyon]

In case highlight.js is considered: there is currently a bug since version 10.4.0 with XML code having a single-letter namespace prefix: https://github.com/highlightjs/highlight.js/issues/2957 (FIXED by @Hirse. Thanks! 👍)