Steps to replicate the issue (include links if applicable):

==Second line has pre tag==
lorem ipsum dolor

sit<pre>amet</pre> lorem

==First line has pre tag==

lorem <pre>ipsum</pre> dolor

sit amet

==Both lines have pre tag==

lorem <pre>ipsum</pre> dolor

sit<pre>amet</pre> lorem
`

What happens?:
When the first or second line has a pre-tag, two paragraphs are rendered.

When both have a pre-tag (third section), "dolor sit" is rendered on one line, like the two newlines don't exist.

What should have happened instead?:
Two paragraphs would be the expected result, if I'm not mistaken.