Use "pre"-mode whitespace rules for <p> tags in Markdown.
Review Request #5858 — Created May 22, 2014 and submitted
Free-form text (<p> tags) are now set to not strip whitespace, causing
them to act just like a <pre> tag. This allows things like indentation
to remain (which Review Bot currently sets).
This is how it used to be, but that was changed in one of the betas to
work around some issues. However, that change was made to *all*
elements, and I don't believe the original issue was with paragraph
Tested with some text from Review Bot. Saw the indentation remain.