code: public static void repeat(char c, int count, StringBuilder sb) {
  		for (int i = 0; i < count; i++) {
  			sb.append(c);
  		}
  	}
docs: Creates a string consisting of "count" occurrences of char "c".
  @param c the character to repeat
  @param count the number of times to repeat the character
  @param sb the character sequence to append the characters to