plugins/markdown/test/data/folding/headersTree.md

<fold text='h1: #'>#
<fold text='h2:  ##'> ##
  ###</fold>
<fold text='h2:  ##'> ##
  ####
  ###</fold></fold>

<fold text='h1: #'>#
<fold text='h2: ##'>##
###</fold></fold>