The functions return a reference to a new object and do not modify in-place
as the following code shows:
````
let s = String::from("   hello   ");
s.trim();
assert_eq!(s, "   hello   ");
````

The new reference should be bound to a variable as now indicated by #[must_use].

trimmed string is returned as a slice instead of a new allocation

Co-Authored-By: matthiaskrgr <matthias.krueger@famsik.de>

…attern

…sn't help

This branch was hit in Clippy and I think it would be nice to
show the thing that was unexpected in the bug message.

It's also in line with the other `bug!` messages in `check_ty`.

The borrow place *must* be a place that we track borrows for, otherwise
we will likely ICE.

…eses-in-match-with-comma, r=oli-obk

suggest `|` when `,` founds in invalid match value

Issue rust-lang#54807
I get stuck on (what | how) I should implement...

Mark str::trim.* functions as #[must_use].

The functions return a reference to a new object and do not modify in-place
as the following code shows:
````
let s = String::from("   hello   ");
s.trim();
assert_eq!(s, "   hello   ");
````

The new reference should be bound to a variable as now indicated by #[must_use].

…mulacrum

use `SOURCE_DATE_EPOCH` for man page time if set

Fixes rust-lang#57776.

…alexcrichton

Introduce into_raw_non_null on Rc and Arc

None

SGX target: improve panic & exit handling

Implement this part of the spec:

> The enclave must not rely on userspace to terminate other threads still running. Similarly, the enclave must not trust that it will no longer be entered by userspace, and it must safeguard against that in the entrypoints.

Also use `UserRef` to access panic buffer

r? @alexcrichton

cc @VardhanThigle

…reavus

Add the edition guide to the bookshelf

…ackmdavis

Improve bug message in check_ty

This branch was hit in Clippy and I think it would be nice to
show the thing that was unexpected in the bug message.

It's also in line with the other `bug!` messages in `check_ty`.

…ichton

Add MOVBE x86 CPU feature

I have no idea if this is correct. I basically copied the ADX feature. I verified the feature is also called `movbe` in LLVM.

I marked this to become stable immediately, as part of the RFC 2045.

r? @alexcrichton

Fixes and cleanups

Address the points raised in https://github.com/rust-lang/rust/pull/57677/files by @eddyb and @RalfJung

…Manishearth

update docs for fix_start/end_matches

fixes rust-lang#57686:

Don't panic when accessing enum variant ctor using `Self` in match

Fix rust-lang#58006.

r? @petrochenkov

… r=oli-obk

Pass correct arguments to places_conflict

The borrow place *must* be a place that we track borrows for, otherwise
we will likely ICE.

Closes rust-lang#57989