Since https://github.com/rust-lang/rust/pull/95503, `library/std` means
"build just std and its dependencies"; to get the old behavior that built
`proc_macro` and `test`, you need `x build library`.
- Update `library/std` to `library`
- Remove the `-i` suggestions; `incremental = true` is already the default for most profiles, in
which case `-i` does nothing. If you don't have incremental enabled, I still think suggesting `-i`
is bad idea, because it's easy to forget once, at which point you'll end up rebuilding the whole
compiler / standard library.
- Remove a few repetitive sections and don't discuss incremental in such detail
Incremental works well enough that it should "just work" for most people;
I don't think it needs multiple paragraphs of explanation so early in the guide.
- Clarify that `test library/std` *only* tests libstd in a few places
This wasn't displayed correctly.
Changing `` ```rust `` to `` ```rust`` made it a code block again,
but the leading space was rendered as-well.
(This may be an issue in mdbook, but I'm not sure.)
This commit changes it to use HTML-syntax in order to get the desired result.
* Rename "The walking tour of rustdoc" to "Rustdoc overview",
which I think is a more accurate name
* Use same name in sidebar TOC as in chapter text
* Make links between the two chapters prominent
* Convert a few `.html` links to `.md`
Probably we should just merge the chapters, but leaving that for later.
The biggest change was updating the list of rustdoc passes. Several new
ones have been added since that documentation was written, so I added
those, and I also sorted the list so it is roughly alphabetical (except
for the part for the `strip-*` passes, which I left in the same order
since one of the list items has two passes so there's no "correct"
order).