Single lines starting with `{a="` disappear

[hellux]

{a=" inline text

gives no output instead of

<p>{a=&rdquo; inline text</p>

[jgm]

Interesting, if you add a blank line after it, or something like "# head", you'll get the expected output. So Perhaps we just need to ensure that the continue function is called again at the end of input?

[jgm]

We need to handle the case where the close method for a attributes container is called, not because continue fails, but because the end of the document has been reached. If at this point the container's extra.status is "continue", we need to reparse.