…eny by default

Reduce duplication by moving fetching logic into a dedicated function.

`writeln!` already includes a reference to `write!` for more
information, so remove duplicated information.

Stabilization has been completed [here](rust-lang#92980 (comment))
with a FCP.

Related to rust-lang#100952

This is definitely not a complete solution, but it does shrink
keysyms/index.html on smithay from 620K to 516K.

This CSS seems to have become obsolete with the move to `<details>` tags,
and its corresponding JavaScript was removed in aee054d

Fixes rust-lang#100994

This selector was added in c7312fb.
The bug can be seen at <https://doc.rust-lang.org/1.27.0/alloc/slice/trait.SliceIndex.html#foreign-impls>.

This rule was added to help with a `<table>` that was used for displaying the
function signature [src] lockup. That lockup was changed in
34bd2b8 to use flexbox instead, leaving this
selector unused (at least, for its original purpose).

Like rust-lang#101023, this removes an attribute with a default value.

…ffset_from, r=Mark-Simulacrum

Stabilize `const_ptr_offset_from`.

Stabilization has been completed [here](rust-lang#92980 (comment)) with a FCP.

Closes rust-lang#92980.

…, r=Mark-Simulacrum

Make forward compatibility lint deprecated_cfg_attr_crate_type_name deny by default

Turns the forward compatibility lint added by rust-lang#83744 to deprecate `cfg_attr` usage with `#![crate_type]` and `#![crate_name]` attributes into deny by default. Copying the example from rust-lang#83744:

```Rust
#![crate_type = "lib"] // remains working
#![cfg_attr(foo, crate_type = "bin")] // will stop working
```

Over 8 months have passed since rust-lang#83744 was merged so I'd say this gives ample time for people to have been warned, so we can make the warning stronger. No usage was found via grep.app except for one, which was in an unmaintained code base that didn't seem to be used in the open source eco system. The crater run conducted in rust-lang#83744 also didn't show up anything.

cc rust-lang#91632 - tracking issue for the lint

Fix wrong compiletest filters on Windows

As discussed in [rust-lang#79334](rust-lang#79334), when calling e.g.
```
python x.py test src/test/ui/expr/compound-assignment/eval-order.rs
```
on Windows, compiletest passes the filter `expr/compound-assignment/eval-order.rs` to libtest, which instead should be `expr\compound-assignment\eval-order.rs`, as that is the file found when collecting tests. This is what I fixed.

I'm not sure how to organize a test for this. Any suggestions?

…mulacrum

Smaller improvements of tidy and the unicode generator

…mulacrum

Update documentation for `write!` and `writeln!`

rust-lang#37472 added this documentation, but it
needs updating:

- Remove some documentation duplicated between `writeln!` and `write!`
- Update `write!` docs: can now import traits as `_` to avoid conflicts
- Expand example to show how to implement qualified trait names

…block-short, r=GuillaumeGomez

rustdoc: omit start/end tags for empty item description blocks

Related to rust-lang#100952

This is definitely not a complete solution, but it does shrink keysyms/index.html on smithay from 620K to 516K.

… r=jsha

rustdoc: remove unused CSS for `hidden-by-*-hider`

This CSS seems to have become obsolete with the move to `<details>` tags,
and its corresponding JavaScript was removed in aee054d

rustdoc: remove incorrect CSS selector `.impl-items table td`

Fixes rust-lang#100994

This selector was added in c7312fb. The bug can be seen at <https://doc.rust-lang.org/1.27.0/alloc/slice/trait.SliceIndex.html#foreign-impls>.

This rule was added to help with a `<table>` that was used for displaying the function signature [src] lockup. That lockup was changed in 34bd2b8 to use flexbox instead, leaving this selector unused (at least, for its original purpose).

…rors

Merge implementations of HIR fn_decl and fn_sig.

…t, r=GuillaumeGomez

rustdoc: remove empty extern_crates and type="text/javascript" on script

Like rust-lang#101023, this removes an attribute with a default value.

…s, r=notriddle

Merge duplicated CSS rules

I used the [stylelint](https://stylelint.io/user-guide/configure) tool to check for duplicated CSS rules in order to merge them.

r? `@notriddle`