Rollup merge of rust-lang#110060 - WaffleLapkin:sync_refs, r=jyn514

JohnTitor · web-flow · commit 1e4361a23f07 · 2023-04-09T12:35:54.000+09:00
Document that `&T` and `&mut T` are `Sync` if `T` is Proof: https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=fec8dc9ec36e873bf2962a2367d67045
diff --git a/library/core/src/primitive_docs.rs b/library/core/src/primitive_docs.rs
@@ -1362,6 +1362,7 @@ mod prim_usize {}
 /// * [`Hash`]
 /// * [`ToSocketAddrs`]
 /// * [`Send`] \(`&T` references also require <code>T: [Sync]</code>)
+/// * [`Sync`]
 ///
 /// [`std::fmt`]: fmt
 /// [`Hash`]: hash::Hash
diff --git a/library/std/src/primitive_docs.rs b/library/std/src/primitive_docs.rs
@@ -1362,6 +1362,7 @@ mod prim_usize {}
 /// * [`Hash`]
 /// * [`ToSocketAddrs`]
 /// * [`Send`] \(`&T` references also require <code>T: [Sync]</code>)
+/// * [`Sync`]
 ///
 /// [`std::fmt`]: fmt
 /// [`Hash`]: hash::Hash
