`make_tokenstream` has three commented hacks, and a comment at the top
referring to rust-lang#67062. These hacks have no observable effect, at least as judged
by running the test suite. The hacks were added in rust-lang#82608, with an explanation
[here](rust-lang#82608 (comment)). It
appears that one of the following is true: (a) they never did anything useful,
(b) they do something useful but we have no test coverage for them, or (c)
something has changed in the meantime that means they are no longer necessary.

This commit removes the hacks and the comments, in the hope that (b) is not
true.

… infer output type lifetimes

This removes a special case that doesn't seem to do anything
any more.

This isn't an ordering test really, anyway...

These seem to have no useful effect... they don't seem useful from a
code inspection point of view, and they affect anything in the test
suite.

…cks, r=Aaron1011

Remove hacks in `make_token_stream`.

`make_tokenstream` has three commented hacks, and a comment at the top
referring to rust-lang#67062. These hacks have no observable effect, at least as judged
by running the test suite. The hacks were added in rust-lang#82608, with an explanation
[here](rust-lang#82608 (comment)). It
appears that one of the following is true: (a) they never did anything useful,
(b) they do something useful but we have no test coverage for them, or (c)
something has changed in the meantime that means they are no longer necessary.

This commit removes the hacks and the comments, in the hope that (b) is not
true.

r? `@Aaron1011`

rustdoc: correct path to type alias methods

Fixes rust-lang#83991

…rrors

Add regression test for rust-lang#68408

Closes rust-lang#68408

…iddle

Fix js error

On the source code pages, we get a JS error:

![Screenshot from 2022-05-10 16-26-53](https://user-images.githubusercontent.com/3050060/167656292-51e0b0e9-6b0c-4f94-82e0-dd8fb77adf52.png)

It's fixed in the first commit. The second one is removing an unused CSS rule and the third one is a little cleanup of a GUI test.

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

…aints, r=compiler-errors

Use lifetimes on type-alias-impl-trait used in function signatures to infer output type lifetimes

fixes rust-lang#96564

TLDR:

```rust
fn execute(ty: Ty<'_>) -> &str { todo!() }
```

(`Ty` being a type alias impl trait) used to produce the following error before this PR

```
error[E0581]: return type references an anonymous lifetime, which is not constrained by the fn input types
 --> src/lib.rs:4:27
  |
4 | fn execute(ty: Ty<'_>) -> &str { todo!() }
  |                           ^^^^
  |
  = note: lifetimes appearing in an associated type are not considered constrained
```

…r-errors

simplify length count

Fix issue rust-lang#95151

Fixes  rust-lang#95151

Nothing special here, just a test for a thing that used to ICE.