% pandoc --wrap=preserve -f html -t markdown <h2>hi there</h2> ^D hi there --------
% pandoc --wrap=preserve -f html -t markdown <h2>hi <em>there again</em></h2> ^D hi *there again* ----------------
% pandoc --wrap=preserve -f html -t markdown <h2>hi<br>there</h2> ^D hi there --------