code: public static Number minus(Character left, Number right) {
          return NumberNumberMinus.minus(Integer.valueOf(left), right);
      }
docs: Subtract a Number from a Character. The ordinal value of the Character
  is used in the subtraction (the ordinal value is the unicode
  value which for simple character sets is the ASCII value).
  
  @param left  a Character
  @param right a Number
  @return the Number corresponding to the subtraction of right from left
  @since 1.0