Adding a newline before one of the closing </pre>'s might yield missing <p> .. </p> tags in other parts of the same post.
Things seem to be formatted fine if the first closing </pre> is on a new line by itself, or if all closing </pre>'s are on the last line of their <pre> blocks. But if the first closing </pre> is at the end of the last line, then using a closing </pre> on a new line somewhere later, messes up the text above it, a bit.
Example output (source):
Some text in <pre>, closing </pre> on the last line, causing some of the following paragraphs to merge into one. Editing this pre-formatted block to put the closing </pre> on a new line by itself, will fix the formatting of those paragraphs, also in the preview.
Line, surrounded by blank lines. Should be a new paragraph followed by whitespace.
Another line, surrounded by blank lines. Should be a yet another new paragraph.
More text in <pre>, closing </pre> on the next line. When NOT changing the closing </pre> of the previous pre-formatted block, then putting the closing </pre> of THIS very pre-formatted block onto its last line, will also fix the formatting of the paragraphs above.
Line, surrounded by blank lines. Should be a new paragraph followed by whitespace.
Fourth line, surrounded by blank lines. Should be a new paragraph again.
The above currently renders the lines following the first <pre> block without any <p> tags at all:
This question originally was an "answer" (not so much) at Preview should match the posted view. In its comments Jeff already found that this is indeed a bug in the original Perl version of Markdown and all descendants. It's not a big deal for me, so I'm just posting it here for future reference. Please just mark it as "won't fix". (I ran into it in revision 1 at some answer at Super User.)
