message: Creating Doxygen group for compound coefficient
diff: @@ -852,8 +852,8 @@ public:
  const IntegrationPoint &ip);
  };
  -/// Coefficients based on sums and products of other coefficients
  -
  +/// Coefficients based on sums, products, or other functions of coefficients.
  +///@{
  /** Scalar coefficient defined as the linear combination of two scalar
  coefficients or a scalar and a scalar coefficient */
  class SumCoefficient : public Coefficient
  @@ -1421,7 +1421,7 @@ public:
  virtual void Eval(DenseMatrix &M, ElementTransformation &T,
  const IntegrationPoint &ip);
  };
  -
  +///@}
  class QuadratureFunction;
  