add the kramdown tags as attributes of special blocks

Usage

set_ktag_block(tags)

Arguments

tags: tags from the function kramdown_tags()

Details

Kramdown is a bit weird in that it uses tags that trail elements like code blocks or block quotes. If these follow block quotes, commonmark will parse them being part of that block quote. This is not problematic per-se until you run into a common situation in the Carpentries' curriculum: nested block quotes

> # Challenge 1
>
> Some text here
>
> > # Solution 1
> >
> > ~~~
> > print("hello world!")
> > ~~~
> > {: .language-pyton}
> {: .solution}
{: .challenge}

When this is parsed with commonmark, the three tags at the end are parsed as being part of the 2nd-level block quote:

...
> > ~~~
> > {: .language-pyton}
> > {: .solution}
> > {: .challenge}

This function will take the block quote elements and add a "ktag" attribute that represents the value of the tag. This will then be parsed by the xslt style sheet and the tags will be properly appended.