Make it trim the contents

…1995

Update bug URL to use the ice template

The previous URL linked to the blank new issue from without any template. This will now link to the ICE template :)

* Before: https://github.com/rust-lang/rust-clippy/issues/new
* After: https://github.com/rust-lang/rust-clippy/issues/new?template=ice.yml

That's it, nothing too interesting besides that. For everyone reading this: here, have some free cream 🍨 🍦 and have a beautiful day. 🙃

changelog: none

[`semicolon_if_nothing_returned`]: add an autofix

changelog: [`semicolon_if_nothing_returned`]: add an autofix

…sery, r=xFrednet

Move tuple_array_conversions to nursery

changelog: Move [`tuple_array_conversions`] to `nursery` (Now allow-by-default)
<!-- FIY: Ignore this change, if the commit gets backported and also rust-lang/rust-clippy#11146 -->
[rust-lang#11172](rust-lang/rust-clippy#11172)

The nursery change got lost in rust-lang#11146 and it ended up in pedantic, this puts it in nursery and gives something to backport

r? `@xFrednet`

new lint: `format_collect`

A perf lint that looks for `format!`ing inside of `map`, then collecting it into a `String`. Did a quick benchmark locally and it's a bit more than 2x faster with fold.
`write!` is still not optimal (presumably because the fmt stuff goes through dynamic dispatch), but it's still a lot better than creating a new string on every element.
I thought about making a machine applicable suggestion, but there's a lot of suggestions that need to be made here, so I decided to just add help messages.

changelog: new lint: `format_collect`

…=Manishearth

Don't lint `needless_return` in fns across a macro boundary

Fixes rust-lang#11167

changelog: none

…ogiq

Rewrite [`tuple_array_conversions`]

Fixes rust-lang#11100
Fixes rust-lang#11144
Fixes rust-lang#11124

rust-lang#11082 still needs discussion and rust-lang#11085 likely can't be fixed.

changelog: [`tuple_array_conversions`]: Move to `pedantic`
changelog: [`tuple_array_conversions`]: Don't lint if mutability of references changes
changelog: [`tuple_array_conversions`]: Don't lint if bindings don't come from the exact same pattern
changelog: [`tuple_array_conversions`]: Don't lint if bindings are used for more than just the conversion

New lint [`four_forward_slashes`]

Closes rust-lang#9212

changelog: New lint [`four_forward_slashes`]

Improve debug assertions for `make_projection`

* Better track when a early-bound region appears when a late-bound region is required
* Don't lint when the closure gives explicit types.

…mpiler.

`redundant_closure` fixes

fixes rust-lang#8548

A good chunk of the code is fixing false negatives. The old code banned any non late-bound regions from appearing in the callee's signature. The new version checks when the late-bound region is actually required.

changelog: Better track when a early-bound region appears when a late-bound region is required in `redundant_closure`.
changelog: Don't lint `redundant_closure` when the closure gives explicit types.

Resolve type aliases in `type_certainty`

Fixes rust-lang#11256

changelog: `unwrap_or_default`: Fix ICE when local types are declared using alias types

[`unnecessary_find_map`]: look for then_some

Closes rust-lang#11260

changelog: [`unnecessary_find_map`]: lint `.then_some()` in closure

[`arithmetic_side_effects`] Fix rust-lang#11262

Fix rust-lang#11262

Rustc already handles paths that refer literals -> https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=d795058a2e1634c867288c20ff9432c8

```
changelog: [`arithmetic_side_effects`]: Ignore paths that refer literals
```