Header ID's Parsing Behavior

[13protons]

Header ID parsing technically works, but there are missing details.

This input markdown:

#hi {#one}

Results in this markup:

<h1 id="hi-one-">hi {#one}</h1>

But I'd expect it to result in this:

<h1 id="one">hi</h1>

That is

• remove the trailing hyphen hi-one- becomes hi-one
• replace the header ID with the specified one instead of concatenating - one vs hi-one-
• remove the attribute block {#one} from the resulting output

[AaronO]

@alanguir Fixed with your PR :+1:

This has been shipped in the kramed@0.4.3 release.