Update README.md

Author: flocked

README.md

@@ -165,13 +165,13 @@ An extended `NSCollectionViewDiffableDataSource that provides:
 
  ## TableViewDiffableDataSource
 
- Simliar to `CollectionViewDiffableDataSource`.
+ Simliar to `CollectionViewDiffableDataSource.
 
   ## OutlineViewDiffableDataSource
 
   A diffable data source for `NSOutlineView` simliar to `CollectionViewDiffableDataSource`.
 
- Example usage:
+ Example usage of a data source with a `String` as `ItemIdentifierType`:
 
  ```swift
     let dataSource = OutlineViewDiffableDataSource<String>(outlineView: outlineView, cellRegistration: cellRegistration)