message: Small change to gen-alpha text
diff: @@ -545,8 +545,9 @@ void GeneralizedAlphaSolver::Step(Vector &x, double &t, double &dt)
  double dt_fac2 = alpha_f*gamma/alpha_m;
  double dt_fac3 = 1.0/alpha_m;
  - // In the first pass xdot is not yet computed. If parameter choices requires
  - // xdot midpoint rule is used instead for the first step only.
  + // In the first pass xdot is not yet computed.
  + // If parameter choices requires xdot then
  + // the first step is done using the midpoint rule
  if (first && (dt_fac1 != 0.0))
  {
  dt_fac1 = 0.0;
  @@ -566,7 +567,6 @@ void GeneralizedAlphaSolver::Step(Vector &x, double &t, double &dt)
  t += dt;
  }
  -
  void
  SIASolver::Init(Operator &P, TimeDependentOperator & F)
  {
  