Migrate std to Rust 2024

Author: ehuss

library/std/Cargo.toml

@@ -6,7 +6,7 @@ version = "0.0.0"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/rust.git"
 description = "The Rust Standard Library"
-edition = "2021"
+edition = "2024"
 autobenches = false
 
 [lib]

library/std/src/keyword_docs.rs

@@ -1064,7 +1064,7 @@ mod move_keyword {}
 /// ```rust,compile_fail,E0502
 /// let mut v = vec![0, 1];
 /// let mut_ref_v = &mut v;
-/// ##[allow(unused)]
+/// # #[allow(unused)]
 /// let ref_v = &v;
 /// mut_ref_v.push(2);
 /// ```

library/std/src/os/windows/process.rs

@@ -531,7 +531,7 @@ impl<'a> ProcThreadAttributeListBuilder<'a> {
     ///     pub Y: i16,
     /// }
     ///
-    /// extern "system" {
+    /// unsafe extern "system" {
     ///     fn CreatePipe(
     ///         hreadpipe: *mut HANDLE,
     ///         hwritepipe: *mut HANDLE,