message: Fixed GHZ->Bell example
diff: @@ -8,8 +8,7 @@ import xacc
  # Mid-circuit measurement is supportted by:
  # - Simulator: qpp, qsim, aer
  # - Selected IBM backends.
  -qpu = xacc.getAccelerator('qpp', {"shots": 1024})
  -# qpu = xacc.getAccelerator('aer', {"shots": 1024})
  +qpu = xacc.getAccelerator('aer', {"shots": 1024})
  q = xacc.qalloc(3)
  @@ -24,6 +23,7 @@ CX(q[1], q[0]);
  H(q[0]);
  // Mid-circuit measurement => Bell state
  Measure(q[0]);
  +CX(q[2], q[1]);
  H(q[2]);
  X(q[0]);
  Measure(q[0]);
  