I agree with Robert that "whitespace" includes newlines in "Emacsland." For example, with this document (the second "#" has a newline immediately after, no spaces or tabs):
#+BEGIN_SRC org foo # comment bar # buzz #+END_SRC This code matches both lines that begin with "#": (re-search-forward (rx bol "#" (1+ space))) But this code only matches the first one, because "blank" only matches "horizontal whitespace": (re-search-forward (rx bol "#" (1+ blank))) So I think Pandoc is technically at fault here. However, outside of Emacs's own context, I can see how the the documentation could be misinterpreted in this case, so it's hard to fault them too much. :)
