-- input --
Some text.

An Old Heading

Not An Old Heading.

And some text.

# A New Heading.

And some more text.

# Not a heading,
because text follows it.

Because text precedes it,
# not a heading.

## Not a heading either.

-- gofmt --
Some text.

# An Old Heading

Not An Old Heading.

And some text.

# A New Heading.

And some more text.

# Not a heading,
because text follows it.

Because text precedes it,
# not a heading.

## Not a heading either.

-- text --
Some text.

# An Old Heading

Not An Old Heading.

And some text.

# A New Heading.

And some more text.

# Not a heading, because text follows it.

Because text precedes it, # not a heading.

## Not a heading either.

-- markdown --
Some text.

### An Old Heading {#hdr-An_Old_Heading}

Not An Old Heading.

And some text.

### A New Heading. {#hdr-A_New_Heading_}

And some more text.

\# Not a heading, because text follows it.

Because text precedes it, # not a heading.

\## Not a heading either.

-- html --
<p>Some text.
<h3 id="hdr-An_Old_Heading">An Old Heading</h3>
<p>Not An Old Heading.
<p>And some text.
<h3 id="hdr-A_New_Heading_">A New Heading.</h3>
<p>And some more text.
<p># Not a heading,
because text follows it.
<p>Because text precedes it,
# not a heading.
<p>## Not a heading either.