gas optimization + prettier

[grGred]

For loop can be gas optimized by adding uint i in for loop.

Example and gas estimation:

    function loopCheck1(uint256[] memory arr) external returns (uint256[] memory) {
        gas = gasleft(); // 29863 gas
        uint length = arr.length;
        for (uint i; i < length;) {
            unchecked { ++i; }
        }
        return arr;
        gas -= gasleft();
    }
    
    function loopCheck2(uint256[] memory arr) external  returns (uint256[] memory) {
        gas = gasleft();
        uint i;
        uint length = arr.length;
        for (; i < length;) { // 29912 gas
            unchecked { ++i; }
        }
        return arr;
        gas -= gasleft();
    }

You can check my article about gas optimizations

I also used prettier. And, maybe, memory arrays could be changed into calldata.