src/serialize/TwoVector.js
/**
     * Subtract other vector to this vector
     *
     * @param {TwoVector} other the other vector
     * @return {TwoVector} returns self
     */
Subtract other vector to this vector
@param {TwoVector} other the other vector
@return {TwoVector} returns self
Subtract other vector to this vector @param { TwoVector } other the other vector @return { TwoVector } returns self
subtract(other) {
        this.x -= other.x;
        this.y -= other.y;
        return this;
    }
subtract ( other ) { this . x -= other . x ; this . y -= other . y ; return this ; }
Subtract other vector to this vector
 @param {TwoVector} other the other vector
 @return {TwoVector} returns self
Subtract other vector to this vector @param { TwoVector } other the other vector @return { TwoVector } returns self