github-pages ProTip doesn't format code

[gagern]

The documentation at https://jekyllrb.com/docs/github-pages/#deploying-jekyll-to-github-pages looks fairly broken, since the ruby … block doesn't get formatted as code. In particular, it doesn't get rendered across multiple lines, so knowing where the line breaks are supposed to be is tricky. I guess that's because of the mix between HTML and Markdown, but I'm not sure.

/cc @jekyll/documentation

[pathawks]

Thank you for bringing this up. 👍
This is a known issue that we are currently working to fix.

Duplicate of #5435