:markdown
 # Title 1

~
  :markdown
   # Title 1

----------------------------------------------------

[
	["filter-markdown", [
		["filter-name", ":markdown"],
		["title", [
			["punctuation", "#"],
			" Title 1"
		]]
	]],
	["punctuation", "~"],
	["filter-markdown", [
		["filter-name", ":markdown"],
		["title", [
            ["punctuation", "#"],
            " Title 1"
        ]]
	]]
]

----------------------------------------------------

Checks for Markdown filter in Haml. The tilde serves only as a separator.
Indentation is intentionally less than 1 tab, otherwise markdown is
interpreted as code.