Method unchar

chapter20/src/main/java/com/seaofnodes/simple/SB.java:84–84

()

  //   sb.unchar().p(']');  // remove extra trailing comma
  //
  public SB unchar() { return unchar(1); }
  public SB unchar(int x) { _sb.setLength(_sb.length()-x); return this; }

  public SB clear() { _sb.setLength(0); return this; }