message: add: diff year example on isSameMonth
diff: @@ -22,6 +22,11 @@ import requiredArgs from '../_lib/requiredArgs/index'
  * // Are 2 September 2014 and 25 September 2014 in the same month?
  * var result = isSameMonth(new Date(2014, 8, 2), new Date(2014, 8, 25))
  * //=> true
  + *
  + * @example
  + * // Are 2 September 2014 and 25 September 2015 in the same month?
  + * var result = isSameMonth(new Date(2014, 8, 2), new Date(2015, 8, 25))
  + * //=> false
  */
  export default function isSameMonth(dirtyDateLeft: Date | number, dirtyDateRight: Date | number): boolean {
  requiredArgs(2, arguments)
  