fix relative link parsing

[rajatjindal]

still testing the changes out, for some reason unable to run make test on my laptop.

[rajatjindal]

.md format	href in rendered html
[URL](https://en.wikipedia.org/)	<a href="https://en.wikipedia.org/">URL</a>
[relative link](./relative.md)	<a href="relative">relative link</a>
[relative link](elsewhere.md)	<a href="elsewhere">relative link</a>
[relative deep link](./relatively/deep.md)	<a href="relatively/deep">relative deep link</a>
[absolute deep link](/absolute/deep.md)	<a href="/absolute/deep">absolute deep link</a>

[rajatjindal]

I will test more tomorrow to ensure it does not break anything.

[dicej]

Looks good to me. It's possible this might break links that were implicitly absolute, but we should be able to fix those on a case-by-case basis.

[rajatjindal]

Thanks for looking at the pr. Could u pls give an example of the link you are referring to. I will add that to the testcase and verify that it works.

Many thanks
Rajat Jindal

[dicej]

For example, imagine you have a couple of documents like this:

foo/bar/baz.md
hello.md

And imagine foo/bar/baz.md has a link like [hello](./hello.md) in it. That's a bad link -- it should be [hello](../../hello.md) instead, but currently bartholomew will render it so it works because all links are converted to absolute. With your change, it will no longer work, but that's ok because it shouldn't have worked in the first place. So we just need to fix such cases in the .md files if we find them.

[rajatjindal]

thanks for the explanation @dicej . yeah I would also consider that as bad link and that should be fixed in the content itself