Bug with nested HTML comments inside backquotes

[jaimeiniesta]

Hi, when some code inside backquotes contains HTML comments, it complains that backquotes are not closed, and the output is incorrect, see this example with Elixir 1.18 and earmark 1.4:

This is fine

iex(1)> m = "some source"
"some source"
iex(2)> Earmark.as_html!(m)
"<p>\nsome source</p>\n"

This is fine as well, backquotes are converted to inline code

iex(3)> m = "some source `2`"
"some source `2`"
iex(4)> Earmark.as_html!(m)
"<p>\nsome source <code class=\"inline\">2</code></p>\n"

But this fails

iex(5)> m = "some source `<!-- 2 -->`"
"some source `<!-- 2 -->`"
iex(6)> Earmark.as_html!(m)
<no file>:1: warning: Closing unclosed backquotes ` at end of input
"<!-- 2 -->\n<p>\n`</p>\n"