[Rfc-markdown] kramdown-rfc-extract-sourcecode: Provide better names to the extracted files

[Carsten Bormann <[e-mail]>]

PR #208 [1] proposes to improve the way kramdown-rfc-extract-sourcecode generates the filenames for sourcecode extracted by it:

> * sourcecode-name values are less heavily mangled; the characters "-" and "." are now allowed (except at the start) and no longer converted into underscores.
> 
> * unnamed files now have their sourcecode type attached (e.g., if the sourcecode type is abnf, unnamed-123 ➔ unnamed-123.abnf)
> 
> This update will, unfortunately, be a flag day for those using this feature from Makefiles or includes in the markdown.
> 
> close #206

I believe this will be a net win for most applications.

But, as mentioned in the PR, it means there will be a flag day (probably in 1.6.44):
E.g., in draft-ietf-jsonpath-base.md, we’ll have to change:

OLD: {::include sourcecode/abnf/jsonpath_collected_abnf}
NEW: {::include sourcecode/abnf/jsonpath-collected.abnf}

I apologize for this nuisance; we normally don’t do flag day changes, but it seems expedient to not introduce tedious gating mechanisms for this specific change in a quite young tool.

If you are using kramdown-rfc-extract-sourcecode today and see a problem with this flag day change (or any other problem, of course), please comment to the PR [1].

Grüße, Carsten

[1]: https://github.com/cabo/kramdown-rfc/pull/208