### Regression tests

Issue #113: EOL character weirdness on Windows
(Important: first line ends with CR + CR + LF)

```````````````````````````````` example
line1

line2
.
<p>line1</p>
<p>line2</p>
````````````````````````````````

Issue #114: cmark skipping first character in line
(Important: the blank lines around "Repeatedly" contain a tab.)

```````````````````````````````` example
By taking it apart

- alternative solutions
→
Repeatedly solving
→
- how techniques
.
<p>By taking it apart</p>
<ul>
<li>alternative solutions</li>
</ul>
<p>Repeatedly solving</p>
<ul>
<li>how techniques</li>
</ul>
````````````````````````````````

Issue jgm/CommonMark#430:  h2..h6 not recognized as block tags.

```````````````````````````````` example
<h1>lorem</h1>

<h2>lorem</h2>

<h3>lorem</h3>

<h4>lorem</h4>

<h5>lorem</h5>

<h6>lorem</h6>
.
<h1>lorem</h1>
<h2>lorem</h2>
<h3>lorem</h3>
<h4>lorem</h4>
<h5>lorem</h5>
<h6>lorem</h6>
````````````````````````````````

Issue jgm/commonmark.js#109 - tabs after setext header line


```````````````````````````````` example
hi
--→
.
<h2>hi</h2>
````````````````````````````````

Issue #177 - incorrect emphasis parsing

```````````````````````````````` example
a***b* c*
.
<p>a*<em><em>b</em> c</em></p>
````````````````````````````````