Some links in the API documentation point to the older URL of the Book

[tirr-c]

The first edition of the Book is moved from /book into /book/first-edition, but some links in the API documentation are not following the change. For example, in core::ops::Deref documentation, there is a link to the 'Deref coercions' page of the first edition, with older URL structure.

This makes kind of "broken link" in the documentation, though it's not a real broken link, because the pages under the older URL suggest that we try with the namespace added. However, it does add additional link that visitors should follow, which probably isn't what they want.

I think the solution is simple; adding first-edition namespace if the link pointing to the Book does not have any namespace. May I work on this issue?

[steveklabnik]

I think the solution is simple; adding first-edition namespace if the link pointing to the Book does not have any namespace. May I work on this issue?

yes, this is a great initial fix! A slightly better one would be to update them to the appropriate spot in the second edition, but that's going to be harder.

[tirr-c]

I noticed that not all documents are moved into first-edition; some documents are moved into the Unstable Book. Fixing the broken links would be harder than I thought...

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Only compiler-plugins.html is moved into the Unstable Book. I hope simple exception handling will do the thing.

[steveklabnik]

Yeah, that should be the only real thing. I'd imagine.

It is also super okay to submit a PR for just some of this as well, if anything is hard to find, feel free to skip it, or post a PR and ask about the ones you're not sure, and I'll happily lend a hand :)