Breaks When Using <br/>

[FlorianWendelborn]

I tried to modify hyperapp's counter example. When inserting a line-break <br/> it broke. 🙁

Console

InvalidCharacterError (DOM Exception 5): The string contains invalid characters.

Minimal Repro

app({
    view: () => html`<div>a<br/>b</div>`
})

Meta

Corresponding issue on hyperapp's repo.
Related to #34.

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Note that I do realize that <br> works. <br/> is more explicit though and as a React-user I'd like to keep this pattern.

[Ramblurr]

I also was caught by this bug.

[josephg]

Some notes:

• Self-closing tags don't exist in the html spec.
• Browsers do ignore the '/' and treat <br/> and <br> as synonyms
• Hyperx works fine if you put in a space - <br />
• It should be easy to change the parser to support this. Its probably a ~2 line change to stop parsing the tag name when the parser sees a '/' character. Make a unit test, fix the code and submit a PR.
• For now, the workaround is to write <br />

[yoshuawuyts]

A PR to support <br/> would be very welcome!