public static String padLeft(String str, int size) {
    StringBuilder strBuilder = new StringBuilder(str);
    while (strBuilder.length() < size) {
      strBuilder.insert(0, " ");
    }
    return strBuilder.toString();
  }
Returns a string with {@code items} rounded to 5 decimals and joined with a comma.
planetiler-core/src/main/java/com/onthegomap/planetiler/util/Format.java