Markdown code blocks expand ticket mentions into full HTML links. I.e. putting #1 into a multi-line code block will result in the following:

<a href="/~sircmpwn/todo.sr.ht/1" title="~sircmpwn/todo.sr.ht#1: Login redirect doesn&#39;t return to the previous page">#1</a>

See below for the current live behavior:

<a href="/~sircmpwn/todo.sr.ht/1" title="~sircmpwn/todo.sr.ht#1: Login redirect doesn&#39;t return to the previous page">#1</a>