use-file-vars seems to be broken

[Tachytaenius]

data = markdown2.markdown(data, extras=["header-ids"]) lets header-ids work in the output data, in that HTML headers have their id attribute.
data = markdown2.markdown(data, extras=["use-file-vars"]) while data starts with <!-- markdown-extras: header-ids --> doesn't let header-ids work; headers are devoid of an id attribute.

I dunno what's wrong here, I'm just saying what I've seen.

[nicholasserra]

Having a bit of trouble following this. Can you provide input and output? Thanks for the report!

[Tachytaenius]

The data that is passed into the markdown2.markdown function is unprocessed markdown. Y'know, underscores and such. You presumably know enough python to understand that the data in data = markdown2... is an output HTML file.

Let data be

<!-- markdown-extras: header-ids -->
# Header

When that is passed in to markdown2.markdown(data, extras=["use-file-vars"]), the output is

Header

(I just noticed that there's an empty line after the attempt at telling the file to use header-ids. Something's happened...) There is no id attribute to the h1 tag, so header-ids hasn't worked!!

However header-ids does work if I remove the <!-- markdown-extras: header-ids --> and replace the processing function with markdown2.markdown(data, extras=["header-ids"]). So yeah, use-file-vars does basically nothing.

[nicholasserra]

Thank you for this extra info. I'll tear into it eventually. In the meantime if you find a fix please make a PR :)