List formatters don't work with items containing multiple paragraphs

[Brickster]

When an item in a list to be formatted contains multiple paragraphs, the formatter incorrectly thinks the list has ended.

For the list:

1. Item 1

    It has multiple paragraphs.

3. Item 2

The expected output would be:

1. Item 1

    It has multiple paragraphs.

2. Item 2

Currently, it becomes two lists:

1. Item 1

    It has multiple paragraphs.

1. Item 2

This applies to both ordered and unordered lists.