This makes it consistent with `x.py` as changed in rust-lang#95671

Fixes rust-lang#100459

This is so you can check out an upstream commit in src/llvm-project and
have everything just work.

Needed after changes in rust-lang#97513.

Use third person, as it is used for other std documentation.

Walkthrough currently say:

```
rustup target add aarch_64-fuchsia
```
but should say

```
rustup target add aarch64-fuchsia
```

The impl-items list stopped being nested inside a docblock since c1b1d68

The filename differed from the link in SUMMARY.md, causing it to 404.

This rule was added in c1c6175 to benefit
the module items table. However, the module items table stopped using table
tags when 6020c79 switched us over to grid
layout.

Add `special_module_name` lint

Declaring `lib` as a module is one of the most common beginner mistakes when trying to setup a binary and library target in the same crate. `special_module_name` lints against it, as well as `mod main;`
```
warning: found module declaration for main.rs
  --> $DIR/special_module_name.rs:4:1
   |
LL | mod main;
   | ^^^^^^^^^
   |
   = note: a binary crate cannot be used as library

warning: found module declaration for lib.rs
  --> $DIR/special_module_name.rs:1:1
   |
LL | mod lib;
   | ^^^^^^^^
   |
   = note: `#[warn(special_module_name)]` on by default
   = note: lib.rs is the root of this crate's library target
   = help: to refer to it from other targets, use the library's name as the path
   ```

Note that the help message is not the best in that it doesn't provide an example of an import path (`the_actual_crate_name::`), and doesn't check whether the current file is part of a library/binary target to provide more specific error messages. I'm not sure where this lint would have to be run to access that information.

…lacrum

Use `getuid` to check instead of `USER` env var in rustbuild

This makes it consistent with `x.py` as changed in rust-lang#95671

Fixes rust-lang#100459

…mulacrum

bootstrap: Add llvm-has-rust-patches target option

This is so you can check out an upstream commit in src/llvm-project and
have everything just work.

This simplifies the logic in `is_rust_llvm` a bit; it doesn't need to
check for download-ci-llvm because we would have already errored if both
that and llvm-config were specified on the host platform.

Make docs formulation more consistent for NonZero{int}

Use third person, as it is used for other `std` documentation.

…re-whitespace, r=notriddle

Remove unneeded where whitespace

It fixes these two bugs:

![Screenshot from 2022-08-31 18-14-40](https://user-images.githubusercontent.com/3050060/187727950-94657419-abfa-454c-9d27-004280fbcb45.png)
![Screenshot from 2022-08-31 18-14-49](https://user-images.githubusercontent.com/3050060/187727956-21d1b39d-62d7-4e7b-8f6f-631ceda67a19.png)

It's a relic from a very old time (this commit: rust-lang@bfd01b7).

You can test the result [here](https://rustdoc.crud.net/imperio/remove-unneeded-where-whitespace/lib2/struct.WhereWhitespace.html).

cc `````````@jsha`````````
r? `````````@notriddle`````````

Fix  bad target name in Walkthrough

Walkthrough currently say:

```
rustup target add aarch_64-fuchsia
```
but should say

```
rustup target add aarch64-fuchsia
```

…re-css, r=jsha

rustdoc: remove unused `.docblock .impl-items` CSS

The impl-items list stopped being nested inside a docblock since c1b1d68

… r=tmandry

Fixes/adjustments to Fuchsia doc walkthrough

Small fixes/adjustments missed during rust-lang#100927

…lett

Update outdated comment about output capturing in print_to.

Fix filename of armv4t-none-eabi.md

The filename differed from the link in SUMMARY.md, causing it to 404.

Fix typo in comment

…_impl, r=notriddle

Fix doc_auto_cfg for impl blocks in different modules with different `cfg`

Fixes rust-lang#101129.

Just like reexports, impl blocks don't necessarily share the same "space" as the item they implement so we need to merge attributes from its parents as well.

r? `@notriddle`

…-when-closure-is-already-marked-as-move, r=oli-obk

Do not suggest adding `move` to closure when `move` is already used

Fixes rust-lang#101227

…first-child, r=GuillaumeGomez

rustdoc: remove unneeded CSS `.content table td:first-child > a`

This rule was added in c1c6175 to benefit the module items table. However, the module items table stopped using table tags when 6020c79 switched us over to grid layout.