<a> tags are created incorrectly on each line in the content

To dupe

1. Paste the below code into html mode
   

<p>top</p>
<p>middle</p>
<p>bottom<br />
</p>

1. Edit line one, to be <p><a href="#bottom">top<a/></p>
2. toggle to Normal view then back to HTML view
3. Notice the change in HTML to:

<p><a href="#bottom">top</a><a></a></p>
<p><a>middle</a></p>
<p><a name="bottom">bottom</a><a><br />
</a></p>