luce/spec/common_mark/atx_headings.unit

>>> ATX headings - 62
# foo
## foo
### foo
#### foo
##### foo
###### foo
<<<
<h1>foo</h1>
<h2>foo</h2>
<h3>foo</h3>
<h4>foo</h4>
<h5>foo</h5>
<h6>foo</h6>
>>> ATX headings - 63
####### foo
<<<
<p>####### foo</p>
>>> ATX headings - 64
#5 bolt

#hashtag
<<<
<p>#5 bolt</p>
<p>#hashtag</p>
>>> ATX headings - 65
\## foo
<<<
<p>## foo</p>
>>> ATX headings - 66
# foo *bar* \*baz\*
<<<
<h1>foo <em>bar</em> *baz*</h1>
>>> ATX headings - 67
#                  foo                     
<<<
<h1>foo</h1>
>>> ATX headings - 68
 ### foo
  ## foo
   # foo
<<<
<h3>foo</h3>
<h2>foo</h2>
<h1>foo</h1>
>>> ATX headings - 69
    # foo
<<<
<pre><code># foo
</code></pre>
>>> ATX headings - 70
foo
    # bar
<<<
<p>foo
# bar</p>
>>> ATX headings - 71
## foo ##
  ###   bar    ###
<<<
<h2>foo</h2>
<h3>bar</h3>
>>> ATX headings - 72
# foo ##################################
##### foo ##
<<<
<h1>foo</h1>
<h5>foo</h5>
>>> ATX headings - 73
### foo ###     
<<<
<h3>foo</h3>
>>> ATX headings - 74
### foo ### b
<<<
<h3>foo ### b</h3>
>>> ATX headings - 75
# foo#
<<<
<h1>foo#</h1>
>>> ATX headings - 76
### foo \###
## foo #\##
# foo \#
<<<
<h3>foo ###</h3>
<h2>foo ###</h2>
<h1>foo #</h1>
>>> ATX headings - 77
****
## foo
****
<<<
<hr />
<h2>foo</h2>
<hr />
>>> ATX headings - 78
Foo bar
# baz
Bar foo
<<<
<p>Foo bar</p>
<h1>baz</h1>
<p>Bar foo</p>
>>> ATX headings - 79
## 
#
### ###
<<<
<h2></h2>
<h1></h1>
<h3></h3>