def run(string)
      string = string.to_s
      ltr_count = chars_count(string, ltr_regex)
      rtl_count = chars_count(string, rtl_regex)
      diff = ltr_count - rtl_count
      return ltr if diff > 0
      return rtl if diff < 0
      nil
    end
def run(string)
      string = string.to_s
      ltr_count = chars_count(string, ltr_regex)
      rtl_count = chars_count(string, rtl_regex)
      diff = ltr_count - rtl_count
      return ltr if diff > 0
      return rtl if diff < 0
      nil
    end
Get the number of ltr and rtl characters in the supplied string and infer
 direction from the most common type. For this strategy the direction can
 be ltr or rtl, but never bidi. In case of draw it returns nil.

 params [String] The string to inspect
 @return [String, nil]