Auto merge of rust-lang#123846 - matthiaskrgr:rollup-85y28av, r=matthiaskrgr

Rollup of 3 pull requests

Successful merges:

 - rust-lang#123796 (Remove unused cargo-platform dependency from tidy)
 - rust-lang#123830 (Remove `From` impls for unstable types that break inference)
 - rust-lang#123842 (fix typo in pin.rs)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

core/src/convert/num.rs

@@ -165,8 +165,8 @@ impl_from!(u16 => f64, #[stable(feature = "lossless_float_conv", since = "1.6.0"
 impl_from!(u32 => f64, #[stable(feature = "lossless_float_conv", since = "1.6.0")]);
 
 // float -> float
-impl_from!(f16 => f32, #[stable(feature = "lossless_float_conv", since = "1.6.0")]);
-impl_from!(f16 => f64, #[stable(feature = "lossless_float_conv", since = "1.6.0")]);
+// FIXME(f16_f128): adding additional `From` impls for existing types breaks inference. See
+// <https://github.com/rust-lang/rust/issues/123824>
 impl_from!(f16 => f128, #[stable(feature = "lossless_float_conv", since = "1.6.0")]);
 impl_from!(f32 => f64, #[stable(feature = "lossless_float_conv", since = "1.6.0")]);
 impl_from!(f32 => f128, #[stable(feature = "lossless_float_conv", since = "1.6.0")]);

core/src/pin.rs

@@ -1198,7 +1198,7 @@ impl<Ptr: Deref<Target: Unpin>> Pin<Ptr> {
     /// Unwraps this `Pin<Ptr>`, returning the underlying pointer.
     ///
     /// Doing this operation safely requires that the data pointed at by this pinning pointer
-    /// implemts [`Unpin`] so that we can ignore the pinning invariants when unwrapping it.
+    /// implements [`Unpin`] so that we can ignore the pinning invariants when unwrapping it.
     ///
     /// # Examples
     ///