InputTagHelper renders a closing tag for type="submit" and type="button"

[DamianEdwards]

The InputTagHelper renders a closing tag when type is equal to "submit" or "button". It's likely this is the behavior for all types not specifically understood by the InputTagHelper after a quick glance at its code.

It's also possible the issue is that the state of TagHelperOuput.SelfClosing does not correctly reflect what is in the source CSHTML and thus the fact the element is already self-closed in the source is lost after parsing (in which case this should be a bug against the Razor repo).

<input type="submit" value="Log in" class="btn btn-default" /> becomes <input class="btn btn-default" type="submit" Value="Log in"></input>

[yishaigalatzer]

We should make sure that if there is content set by the taghelper we do need to render the end tag :)