def step(limit, step = 1)
      if block_given?
        super {|dt| yield dt.clear_timezone_offset }
      else
        enum = super
        enum.each {|dt| dt.clear_timezone_offset }
        enum
      end
    end
def step(limit, step = 1)
      if block_given?
        super {|dt| yield dt.clear_timezone_offset }
      else
        enum = super
        enum.each {|dt| dt.clear_timezone_offset }
        enum
      end
    end
An overridden version of `DateTime#step` that clears the associated
 {TimezoneOffset} of the returned or yielded instances.