jooby/src/main/java/org/jooby/Err.java
private static String message(final String reason, final int status, @Nullable  final String tail) {
    return reason + "(" + status + ")" + (tail == null ? "" : ": " + tail);
  }
private static String message(final String reason, final int status, @Nullable  final String tail) {
    return reason + "(" + status + ")" + (tail == null ? "" : ": " + tail);
  }
Build an error message using the HTTP status.

@param reason Reason.
@param status The Status.
@param tail A message to append.
@return An error message.