message: Update hashing/src/lib.rs
  Fix spelling of "Merkle"
diff: @@ -656,7 +656,7 @@ mod tests {
  .map(Digest::blake2b_hash),
  );
  - // The concatenation of `2u64` in little endian + the merkle root hash `R`. Note that this
  + // The concatenation of `2u64` in little endian + the Merkle root hash `R`. Note that this
  // is a valid hashable object on its own.
  let maybe_colliding_short_data = [
  2, 0, 0, 0, 0, 0, 0, 0, 19, 25, 57, 74, 152, 208, 203, 25, 79, 150, 14, 55, 72, 186,
  