Rendering issues for posts that contain <p> elements.

[defnull]

The template tries to put the (sanitized) post content into a <p class="wall-text"> tag. If the post itself uses <p> elements, the resulting template looks like <p class="wall-text"><p>...</p></p>. Problem is, <p> tags cannot contain other <p> tags as direct children, so browsers will unwrap the tags and the resulting DOM will actually be <p class="wall-text"></p><p>...</p>, breaking formatting and also confusing the updateTimesOnPage function.