Fix a typo in a comment in block.rs
@@ -109,7 +109,7 @@ pub struct BlockHeader {
pub merkle_root_hash: MerkleTreeRootHash,
/// [Sapling onward] The root LEBS2OSP256(rt) of the Sapling note
- /// commitment tree corresponding to the finnal Sapling treestate of
+ /// commitment tree corresponding to the final Sapling treestate of
/// this block.
pub final_sapling_root_hash: SaplingNoteTreeRootHash,
