Add horizontal rule

[jasonvarga]

This adds support for <hr> tags.

However, the test doesn't pass. I'm not sure what needs to be done.

You should be able to have an hr inside a p, right? That test doesn't pass.
e.g. <p>foo<hr>bar</p>.

hr outside of a p seems to be ok.
e.g. <p>foo</p><hr><p>bar</p>

[jasonvarga]

I put <p>foo<hr>bar</p> into https://validator.w3.org/nu/#textarea and it had an error, so I guess that's the answer. I'll update the code.

[sjclark]

I put <p>foo<hr>bar</p> into https://validator.w3.org/nu/#textarea and it had an error, so I guess that's the answer. I'll update the code.

hr's are intended to be structural / thematic breaks so I guess having them within a paragraph is sacrilege 🤷‍♂️
Thanks for PR'ing this!

[jasonvarga]

Yeah after looking into it, I agree. But I just noticed it seemed to render just fine in the browser. Happy accident I suppose.

[hanspagel]

Amazing! 👍 Thanks for the PR!