Wrongly adds a closing tag for self-closing elements

[boris-petrov]

<hr class="foobar" />

Such code is turned into:

<hr class="foobar"></hr>

Which then blows up in Ember's template compiler: <hr> elements do not need end tags. You should remove it:.

[boris-petrov]

Actually this is true also for components:

<FooBar @baz="stuff" />

Becomes:

<FooBar @baz="stuff"></FooBar>

Which is wrong and changes the meaning - the component might be using has-block which will break.