Relative paths in html anchors

[nojaf]

Somewhat related to #764.
If the links are defined inside <a> tags in Markdown, they are not transformed to their .html counterparts.

We typically use:

<div class="d-flex justify-content-between my-4">
  <a href="./GettingStarted.html">Previous</a>
  <a href="./Configuration.html">Next</a>
</div>

to get around this.
Preferably we can write <a href="./GettingStarted.md">Previous</a> as well here.

[nojaf]

Initial guess, with some more processing in

FSharp.Formatting/src/FSharp.Formatting.Markdown/MarkdownUtils.fs

Line 318 in 688cc5c

| InlineHtmlBlock (code, count, range) -> InlineHtmlBlock(mapText f code, count, range)

we can achieve this? If this is the case, would you accept a PR?

[dsyme]

That seems quite hard to arrange - it would mean parsing arbitrary HTML. We could use a heuristic but it feels like a slippery slope

[nojaf]

Yes, I do have in mind to parse the HTML as an XmlElement and look for //a/@href[ends-with('.md')] (or similar) xpath selector.

[dsyme]

That's reasonable, yes