Use deref coercion to let the compiler remove any amount of references.

* revise comments explaining why we are using literal or expression
* add unspecified precision comments as we don't guarantee precision
* use expression in `f128::to_degrees()`
* make `f64::to_degrees()` impl consistent with other functions

add Option::reduce

Tracking issue: rust-lang#144273

…=tgross35

Simplify macro generating ToString implementations for `&…&str`

Use deref coercion to let the compiler remove any amount of references. Also use that macro for `Cow` and `String`.

…iteral, r=beetrees,tgross35

improve float to_degrees/to_radians rounding comments and impl

This PR makes `to_degrees()` and `to_radians()` float functions more consistent between each other and improves comments around their precision and rounding.

* revise comments explaining why we are using literal or expression
* add unspecified precision comments as we don't guarantee precision
* use expression in `f128::to_degrees()`
* make `f64::to_degrees()` impl consistent with other functions

r? `@tgross35`

…obzol

Introduce a `[workspace.dependencies`] section in the top-level `Cargo.toml`

It lets us avoid a lot of repetition of crate versions, etc.

I've just done a few as a start. Many more can be done in follow-ups.

r? `@Kobzol`

Inherit TCC in debuginfo tests on macOS

macOS has a system for propagating folder permissions, which LLDB disables when spawning processes, which in turn causes debuginfo tests to spam the user with repeated pop-ups asking for permissions. See the code comment for details, as well as the following video for an example of how this looks in practice:

https://github.com/user-attachments/assets/1e54f5b8-9130-4b59-8e92-1db1e58fb361

I stumbled upon the incantation to fix this (`settings set target.inherit-tcc true`) while investigating slowdowns when spawning newly created binaries due to XprotectService, see [this Zulip thread](https://rust-lang.zulipchat.com/#narrow/channel/246057-t-cargo/topic/build.20scripts.20slow.20on.20macOS.3F).

This would allow me to no longer have a `build.build-dir = "/Users/madsmtm/rust-build"` workaround in my `bootstrap.toml`.

Stop calling unwrap when format foreign has trailing dollar

Fixes rust-lang#137580