vim/runtime/syntax/testdir/input/markdown_conceal.markdown

Italic, Italic. Bold, Bold.
Bold Italic, Bold Italic.
Strikethrough, S̶t̶r̶i̶k̶e̶t̶h̶r̶o̶u̶g̶h̶.

<p>
<del>Strikethrough</del>, <s>Strikethrough</s>.<br />

<strong><em>Bold Italic</em></strong>.
<strong><em>Bold Italic</em></strong>.<br />
<strong>Bold</strong>, <strong>Bold</strong>.
<em>Italic</em>, <em>Italic</em>.