Math description details bug/other tags

Does this bug occur with any other tags? Use  to test!

Not tested
The following tags were not tested, due to various constraints in how they work:


 * (does not allow content)
 * (does not allow content)
 * (content is 'd)
 * (see below)

Bulleted lists
Uses the following tags: ,

$$y = mx + b$$

Numbered lists
Uses the following tags: ,

$$y = mx + b$$

Description lists
Uses the following tags:, ,

$$y = mx + b$$(We already know that the  tag is affected, no need to check again.)

Tables
Uses the following tags:, , , ,

Introduction
Ruby annotations are apparently really complicated, since every website I looked at gave me a different recommendation. Not even the WHATWG and W3C specs are in agreement! The former lists three elements, which are supposed to be used like so:

phrasing contentseparator fallback<rt>annotation</rt>

The latter lists five elements, one of which isn't even available on FANDOM. Browser support for ruby annotations is partial at best, but most seem to only support the WHATWG version. As such, I have decided to ignore the W3C spec.

Test
Uses the following tags:, ,

$$y = mx + b$$$$y = mx + b$$</rp><rt>$$y = mx + b$$</rt>

$$y = mx + b$$

(deprecated)
$$y = mx + b$$

$$y = mx + b$$

(deprecated)
$$y = mx + b$$

"$y = mx + b$"

(deprecated)
$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

(deprecated)
$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

$$y = mx + b$$

(deprecated)
$$y = mx + b$$

$$y = mx + b$$

$y = mx + b$

$y = mx + b$

(deprecated)
<tt>$$y = mx + b$$</tt>

$$y = mx + b$$

$$y = mx + b$$