private Appendable appendSeparator(final char separatorChar) throws IOException {
    this.out.append(separatorChar);
    if (this.prettyPrinting()) {
      this.out.append(' ');
    }
    return this.out;
  }
Whether a {@link Tokens#VALUE_SEPARATOR} needs to be printed before the beginning of the next object.
nbt/src/main/java/net/kyori/adventure/nbt/TagStringWriter.java