Syntax highlighting preview isn't available for local builds

[hinerm]

When using code fences (``` ```) we do not see code syntax highlighting when building locally. This has something to do with using jekyll 4.2 directly instead of the gh-pages gem. It would be nice to have this preview.

In the interim, adding a note to code editing.

[mattxwang]

Hm interesting, I can't repro this issue locally - is there a specific set of steps I should take?

[ctrueden]

It doesn't work for me locally, either. I tested the following setups:

• Ubuntu 20.04 with Firefox
• Ubuntu 20.04 with Chromium
• macOS Big Sur with Firefox
• macOS Big Sur with Chrome
• macOS Big Sur with Safari

None of these highlight colors on the first code block of develop/debugging, but do highlight them on the live site.

@mattxwang Is it possibly because you're using Ruby 3 rather than Ruby 2.7? What's your browser + OS?

I tried adding all the missing gems from the gh-pages-based Gemfile to a 4.2-based Gemfile, to see whether that would magically make the code-fences-based code blocks start highlighting successfully in the local Jekyll installation. Unfortunately, no dice. I'm not sure why 4.2 doesn't highlight code fenced code locally. But the fact that it does it successfully on the live site is good enough for me, for now. This issue is definitely low priority in my view.