Auto merge of #136272 - Zalathar:rollup-6s577l5, r=Zalathar

Rollup of 5 pull requests

Successful merges:

 - #135847 (optimize slice::ptr_rotate for small rotates)
 - #136215 (btree/node.rs: remove incorrect comment from pop_internal_level docs)
 - #136252 (spastorino back from vacations)
 - #136254 (Rustc dev guide subtree update)
 - #136259 (Cleanup docs for Allocator)

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

1 files changed, 2 insertions, 2 deletions

diff --git a/library/alloc/src/collections/btree/node.rs b/library/alloc/src/collections/btree/node.rs
index 6815ac1c193..37f784a322c 100644
--- a/library/alloc/src/collections/btree/node.rs
+++ b/library/alloc/src/collections/btree/node.rs
@@ -600,8 +600,8 @@ impl<K, V> NodeRef<marker::Owned, K, V, marker::LeafOrInternal> {
     /// no cleanup is done on any of the keys, values and other children.
     /// This decreases the height by 1 and is the opposite of `push_internal_level`.
     ///
-    /// Requires exclusive access to the `NodeRef` object but not to the root node;
-    /// it will not invalidate other handles or references to the root node.
+    /// Does not invalidate any handles or references pointing into the subtree
+    /// rooted at the first child of `self`.
     ///
     /// Panics if there is no internal level, i.e., if the root node is a leaf.
     pub(super) fn pop_internal_level<A: Allocator + Clone>(&mut self, alloc: A) {