oz-L13: natspec for action constants

src/libraries/ActionConstants.sol

@@ -1,6 +1,9 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 pragma solidity ^0.8.0;
 
+/// @title Action Constants
+/// @notice Common constants used in actions
+/// @dev Constants are gas efficient alternatives to their literal values
 library ActionConstants {
     /// @notice used to signal that an action should use the input value of the open delta on the pool manager
     /// or of the balance that the contract holds
@@ -9,7 +12,9 @@ library ActionConstants {
     /// This value is equivalent to 1<<255, i.e. a singular 1 in the most significant bit.
     uint256 internal constant CONTRACT_BALANCE = 0x8000000000000000000000000000000000000000000000000000000000000000;
 
-    /// @notice used to signal that the recipient of an action should be the msgSender or address(this)
+    /// @notice used to signal that the recipient of an action should be the msgSender
     address internal constant MSG_SENDER = address(1);
+
+    /// @notice used to signal that the recipient of an action should be the address(this)
     address internal constant ADDRESS_THIS = address(2);
 }