message: [typo] Fix typo in Patricia
  Fixed Merkle Patricia name
diff: //! that any subtree containing 0 or 1 leaf node will be replaced by that leaf node or a placeholder
  //! node with default hash value. With this optimization we can save CPU by avoiding hashing on
  //! many sparse levels in the tree. Physically, the tree is structurally similar to the modified
  -//! Pactricia Merkle tree of Ethereum, with some modifications. Please read the code for details.
  +//! Patricia Merkle tree of Ethereum, with some modifications. Please read the code for details.
  #![allow(clippy::unit_arg)]
  