fixing typos

contracts/src/arbitration/KlerosCore.sol

@@ -21,7 +21,7 @@ import {SortitionSumTreeFactory} from "../data-structures/SortitionSumTreeFactor
  *  Core arbitrator contract for Kleros v2.
  */
 contract KlerosCore is IArbitrator {
-    using SimpleSquanch for bytes32; // Use library functions for deserialization to reduce L1 calldata costs on Optimistic Rollups.
+    using SSQ for bytes32; // Use library functions for deserialization to reduce L1 calldata costs on Optimistic Rollups.
     using SortitionSumTreeFactory for SortitionSumTreeFactory.SortitionSumTrees; // Use library functions for sortition sum trees.
 
     // ************************************* //
@@ -344,12 +344,12 @@ contract KlerosCore is IArbitrator {
     // ************************************* //
 
     /** @dev Sets the caller's stake in a subcourt by passing serialized args to reduce L1 calldata gas costs on optimistic rollups.
-     *  @param _agrs The SSQ serialized arguments.
+     *  @param _args The SSQ serialized arguments.
      */
     function setStake(bytes32 _args) external{
         uint256 subcourtID;
         uint256 stake;
-        (tmp, _args) = _args.unsquanchUint256();
+        (subcourtID, _args) = _args.unsquanchUint256();
         (stake, _args) = _args.unsquanchUint256();
         require(setStakeForAccount(msg.sender, uint96(subcourtID), stake, 0), "Staking failed");
     }
@@ -385,9 +385,11 @@ contract KlerosCore is IArbitrator {
      */
     function createDispute(uint256 _numberOfChoices, bytes calldata _extraData)
         external
+        override
         payable
         returns (uint256 disputeID)
     {
+        require(msg.value >= arbitrationCost(_extraData), "Not enough ETH to cover arbitration cost.");
         return _createDispute(_numberOfChoices, _extraData);
     }
 
@@ -399,11 +401,8 @@ contract KlerosCore is IArbitrator {
      */
     function _createDispute(uint256 _numberOfChoices, bytes memory _extraData)
         internal
-        payable
-        override
         returns (uint256 disputeID)
     {
-        require(msg.value >= arbitrationCost(_extraData), "Not enough ETH to cover arbitration cost.");
         (uint96 subcourtID, , uint8 disputeKitID) = extraDataToSubcourtIDMinJurorsDisputeKit(_extraData);
 
         uint256 bitToCheck = 1 << disputeKitID; // Get the bit that corresponds with dispute kit's ID.

contracts/src/libraries/SSQ.sol

@@ -84,7 +84,7 @@ library SSQ {
      *  @param decodedBytes Left zero padded bytes array containing decoded values.
      *  @param remainder The remaining encoded byte32.
      */
-    function unsquanchBytesLeftPadded(bytes32 encoded) public returns (bytes memory decodedBytes, bytes32 remainder){
+    function unsquanchBytesLeftPadded(bytes32 encoded) public pure returns (bytes memory decodedBytes, bytes32 remainder){
 
         assembly {
 
@@ -129,7 +129,7 @@ library SSQ {
      *  @param decodedUint256 Decoded uint256
      *  @param remainder The remaining encoded byte32.
      */
-    function unsquanchUint256(bytes32 encoded) public returns (uint256 decodedUint256, bytes32 remainder){
+    function unsquanchUint256(bytes32 encoded) public pure returns (uint256 decodedUint256, bytes32 remainder){
         assembly {
             let decodedIndex := 0 
             for { let j := 0 } lt(j,0x20) {j := add(j,1)} {
@@ -148,7 +148,7 @@ library SSQ {
      *  @param decodedUint256Array Left zero padded bytes array containing decoded values.
      *  @param remainder The remaining encoded byte32.
      */
-    function unsquanchUint256Array(bytes32 encoded) public returns (uint256[] memory decodedUint256Array, bytes32 remainder){
+    function unsquanchUint256Array(bytes32 encoded) public pure returns (uint256[] memory decodedUint256Array, bytes32 remainder){
 
         assembly {
 
@@ -191,7 +191,7 @@ library SSQ {
      *  @param _input Input to be serialized.
      *  @param _result Serialized 'Squanched' result.
      */
-    function encode(bytes32 _input) public returns (bytes32  _result){
+    function encode(bytes32 _input) public pure returns (bytes32  _result){
         assembly {
             let i := 0
             for { } gt(_input,0x7F) {i := add(i,1)} {
@@ -206,7 +206,7 @@ library SSQ {
      *  @param _input Input to be deserialized.
      *  @param _result Deserialized 'Unsquanched' result.
      */
-    function decode(bytes32 _input) public returns (bytes32 _result){
+    function decode(bytes32 _input) public pure returns (bytes32 _result){
         assembly {
             for { let i := 0x0 } gt(_input,0) {i := add(i,0x1)} {
                 _result := add(_result,shl(mul(7,i),and(_input, 0x7F)))