code: private void resetIndent() {
          setArrayStart("{" + LINE_SEPARATOR + spacer(spaces));
          setArraySeparator("," + LINE_SEPARATOR + spacer(spaces));
          setArrayEnd(LINE_SEPARATOR + spacer(spaces - INDENT) + "}");
  
          setContentStart("[" + LINE_SEPARATOR + spacer(spaces));
          setFieldSeparator("," + LINE_SEPARATOR + spacer(spaces));
          setContentEnd(LINE_SEPARATOR + spacer(spaces - INDENT) + "]");
      }
docs: Resets the fields responsible for the line breaks and indenting.
  Must be invoked after changing the {@link #spaces} value.