E.g. https://sourceforge.net/p/allura/tickets/1781/#d88b was an email reply where the original message ("ticket has been created" email) was left in the body. Our parsing should strip lines that have the standard reply notation "> "
We should ignore signatures too (anything after a line.strip() == "--").
Covered in [#1982]
Related
Tickets:
#1982Re-opening this ticket to split the reply handling from blockquote aesthetics.