Rollup merge of rust-lang#79333 - o752d:patch-3, r=Mark-Simulacrum

doc typo plus a small edit for clarity

Author: jonas-schievink

library/alloc/src/collections/btree/map.rs

@@ -1551,12 +1551,12 @@ where
  pred: F,
  inner: DrainFilterInner<'a, K, V>,
 }
-/// Most of the implementation of DrainFilter, independent of the type
+/// Most of the implementation of DrainFilter are generic over the type
 /// of the predicate, thus also serving for BTreeSet::DrainFilter.
 pub(super) struct DrainFilterInner<'a, K: 'a, V: 'a> {
  /// Reference to the length field in the borrowed map, updated live.
  length: &'a mut usize,
- /// Burried reference to the root field in the borrowed map.
+ /// Buried reference to the root field in the borrowed map.
  /// Wrapped in `Option` to allow drop handler to `take` it.
  dormant_root: Option<DormantMutRef<'a, Root<K, V>>>,
  /// Contains a leaf edge preceding the next element to be returned, or the last leaf edge.