Issue

On this specific markdown (pay attention to the unique line return after the toc marker)

[TOC] where am I?

The nl2br and toc extensions used together remove the second line :

import markdown parser = markdown.Markdown(extensions=['toc', 'nl2br']) print(parser.convert("[TOC]\nWhere am I?",))

prints :

<div class="toc"> <ul></ul> </div>

• Add another \n between the marker and the seconde line, and it's ok.
• Do not use nl2br, and it's also ok (in this case, the toc is not created, but I guess it's the expected behavior, as [toc] should be a block).

Expected behavior

From what I understand, and regarding previous versions (tested on Markdown==3.1.1), the result should be:

<p>[TOC]<br> x</p>

Context

• Python 3.9.6 and Python 3.7.3
• Markdown==3.3.4
• both 5.10.25-linuxkit and MacOS