Fix support for nested lists inside

[Peque]

You can now write nested lists like so:

- Foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo
    bar foo bar foo bar foo bar foo bar.

    Another paragraph within the first list item.

- Foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo
    bar foo bar foo bar foo bar foo bar.

    Another paragraph within the second list item.

Which renders as expected: one single <ul> containing two <li> each with two <p>.

According to the reference Markdown syntax, followed by Python-Markdown and, hence, mkdocs:

List items may consist of multiple paragraphs. Each subsequent paragraph in a list item must be indented by either 4 spaces or one tab

However, when nesting them inside a definition list, instead of:

:   Definition description.

    - Foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo
        bar foo bar foo bar foo bar foo bar.

        Another paragraph within the list item.

They get formatted as:

:   Definition description.

    - Foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar
      foo bar foo bar foo bar foo bar foo bar.

      Another paragraph within the list item.

The former renders the expected HTML:

<dd>
<p>Definition description.</p>
<ul>
<li>
<p>Foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo
    bar foo bar foo bar foo bar foo bar.</p>
<p>Another paragraph within the list item.</p>
</li>
</ul>
</dd>

While the latter results in an HTML where "Another paragraph" is not inside the list item, but rendered as a new paragraph inside the description:

<dd>
<p>Definition description.</p>
<ul>
<li>Foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar foo bar
  foo bar foo bar foo bar foo bar foo bar.</li>
</ul>
<p>Another paragraph within the list item.</p>
</dd>

This issue is related to #58 (comment).

[Peque]

@KyleKing PS: Note that the use of a single space after the - (for the first line of a list item) is current mdformat-mkdocs behavior. Maybe using always 4-space indentation (making the first line of a list item start with - is more common, I don't know. But both are Python-Markdown compliant, so I don't really care that much, as long as the formatted Markdown yields the expected HTML.

I mention it in case making everything use 4-space indentation (removing the first line exception) makes things easier. 😊

[KyleKing]

Thanks for waiting and should be resolved in 4.5.1 (as soon as I resolve the CI errors)!

[KyleKing]

And released as 4.5.1!