// These end up inside the main class

static class LFixWhitespace extends LearnerImpl {
  static boolean debug;
  Learner base;
  String s;
  
  *(Learner *base) {}
  
  public void tryAgain() {
    base.tryAgain();
  }
  
  public void processInOut(Object _in, Object _out) {
    String in = (String) _in, out = (String) _out;
    int i = count(in), j = count(out);
    in = in.substring(i);
    s = out.substring(0, j);
    out = out.substring(j);
  if (debug)
      System.out.println("LFixWhitespace: Feeding to input learner: " + in + " => " + out);
    base.processInOut(in, out);
  }
  
  public Object processIn(Object _in) {
    String in = (String) _in;
    int i = count(in);
    in = in.substring(i);
    in = (String) base.processIn(in);
    in = s + in;
    return in;
  }

  int count(String s) {
    int I = 0;
    while (I < s.length () && "\r\n\t ".indexOf(s.charAt(I)) >= 0)
      ++I;
    return I;
  }

}

Began life as a copy of #1000387