docs: public static CharMatcher isNot(final char match) {
      return new FastMatcher() {
        @Override public boolean matches(char c) {
          return c != match;
        }
  
        @Override public CharMatcher and(CharMatcher other) {
          return other.matches(match) ? super.and(other) : other;
        }
  
        @Override public CharMatcher or(CharMatcher other) {
          return other.matches(match) ? ANY : this;
        }
  
        @GwtIncompatible("java.util.BitSet")
        @Override
        void setBits(BitSet table) {
          table.set(0, match);
          table.set(match + 1, Character.MAX_VALUE + 1);
        }
  
        @Override public CharMatcher negate() {
          return is(match);
        }
  
        @Override public String toString() {
          return "CharMatcher.isNot('" + showCharacter(match) + "')";
        }
      };
    }