adjust the format

Author: YiminJin

include/aspect/utilities.h

@@ -1411,12 +1411,12 @@ namespace aspect
       /**
        * Compute the deviator of a symmetric tensor. Unlike the function with the same name in
        * deal.II, this function is consistent with the plane strain assumption when dim = 2.
-       * Specifically, the deviator of the stress tensor $\mathbf\tau$ in 2D is given by 
+       * Specifically, the deviator of the stress tensor $\mathbf\tau$ in 2D is given by
        * $\text{dev}(\mathbf\tau) = \mathbf\tau - \frac{1}{3}\text{trace}(\mathbf\tau)\mathbf 1$
        * under the plane strain assumption.
        */
       template <int dim>
-      SymmetricTensor<2,dim> 
+      SymmetricTensor<2,dim>
       deviator(const SymmetricTensor<2,dim> &input);
 
       /**

source/material_model/drucker_prager.cc

@@ -64,7 +64,7 @@ namespace aspect
               // In later iterations and timesteps we calculate the second moment
               // invariant of the deviatoric strain rate tensor.
               // This is equal to the negative of the second principle
-              // invariant of the deviatoric strain rate, as shown in Appendix A of 
+              // invariant of the deviatoric strain rate, as shown in Appendix A of
               // Zienkiewicz and Taylor (Solid Mechanics, 2000).
               //
               // The negative of the second principle invariant is equal to 0.5 e_dot_dev_ij e_dot_dev_ji,

source/material_model/rheology/visco_plastic.cc

@@ -306,7 +306,7 @@ namespace aspect
                            ExcMessage("Invalid strain_rate in the MaterialModelInputs. This is likely because it was "
                                       "not filled by the caller."));
 
-                    const SymmetricTensor<2, dim> effective_strain_rate = 
+                    const SymmetricTensor<2, dim> effective_strain_rate =
                       elastic_rheology.calculate_viscoelastic_strain_rate(Utilities::Tensors::deviator(in.strain_rate[i]),
                                                                           stress_0_advected,
                                                                           stress_old,