diff --git a/src/collections/sparse_set.rs b/src/collections/sparse_set.rs
index 2bbcc7e..a23117c 100644
--- a/src/collections/sparse_set.rs
+++ b/src/collections/sparse_set.rs
@@ -10,7 +10,7 @@ use bytemuck::Contiguous;
 const SPARSE_PAGESIZE: usize = (1 << 10) * 4;
 type SparsePage<A> = Option<(Box<[Option<NonZeroUsize>; SPARSE_PAGESIZE], A>, usize)>;
 
-/// A sparse set for fast lookup of large indices
+/// A sparse set for fast lookup of large indices.
 ///
 /// The sparse allocator is mainly used for bulk allocations in the system's page size
 /// for the lookup array. It will also be used for the array of pointers into those