raison detre

Author: molpopgen

tests/test_edge_difference_iteration.rs

@@ -56,6 +56,8 @@ fn make_treeseq() -> tskit::TreeSequence {
         .unwrap()
 }
 
+// A fundamental property of iterators is that their Items
+// are collectible into objects that are valid to use later.
 #[test]
 fn test_collect_edge_diff_iterators() {
     let ts = make_treeseq();