Fix indentation

Author: Wang-yijun

cookbooks/CPO_induced_anisotropic_viscosity/plugin/anisotropic_stress.cc

@@ -117,11 +117,11 @@ namespace aspect
                                                   "tensor. The anisotropic stress is defined as $2 \eta "
                                                   "(\varepsilon(\mathbf u) - \tfrac 13 \textrm{trace}\ "
                                                   "\varepsilon(\mathbf u) \mathbf 1) = 2\eta (\varepsilon(\mathbf u) - "
-                                                      "\frac 13 (\nabla \cdot \mathbf u) \mathbf I)$ * stress_strain_directors, and differs from the "
-                                                      "full stress by the absence of the pressure.  The second term in the "
-                                                      "difference is zero if the model is incompressible. "
-                                                      "This particle property plugin should only be activated when using the "
-                                                      "CPO induced anisotropic viscosity material model from the cookbook.")
-                                                    }
-                                                    }
-                                                    }
+                                                  "\frac 13 (\nabla \cdot \mathbf u) \mathbf I)$ * stress_strain_directors, and differs from the "
+                                                  "full stress by the absence of the pressure.  The second term in the "
+                                                  "difference is zero if the model is incompressible. "
+                                                  "This particle property plugin should only be activated when using the "
+                                                  "CPO induced anisotropic viscosity material model from the cookbook.")
+    }
+  }
+}