Update twenty-first/src/util_types/merkle_tree.rs

Co-authored-by: Jan Ferdinand Sauer <ferdinand@neptune.cash>

Author: aszepieniec

twenty-first/src/util_types/merkle_tree.rs

@@ -660,14 +660,7 @@ pub mod merkle_tree_test {
         #[strategy(arb())]
         pub tree: MerkleTree,
 
-        #[
-            strategy(
-                vec(
-                    (0 as MerkleTreeLeafIndex)..#tree.num_leafs(),
-                    0..(#tree.num_leafs() as usize)
-                )
-            )
-        ]
+        #[strategy(vec(0..#tree.num_leafs(), 0..(#tree.num_leafs() as usize)))]
         pub selected_indices: Vec<MerkleTreeLeafIndex>,
     }