Fix typo

Author: Wang-yijun

cookbooks/CPO_induced_anisotropic_viscosity/plugin/anisotropic_stress.cc

@@ -112,14 +112,15 @@ namespace aspect
     {
       ASPECT_REGISTER_VISUALIZATION_POSTPROCESSOR(AnisotropicStress,
                                                   "Anisotropic stress",
-                                                  "A visualization output object that generates output "
-                                                  "for the 6 (in 3d) components of the anisotropic stress "
-                                                  "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.")
+                                                  "A visualization output "
+                                                  "object that generates "
+                                                  "adiabatic temperature, pressure, "
+                                                  "density, and density derivative (with regard to depth)"
+                                                  "as produced by the \\texttt{AdiabaticConditions} class."
+                                                  "\n\n"
+                                                  "Physical units: $\\text{K}$, $\\text{Pa}$, "
+                                                  "$\\frac{\\text{kg}}{\\text{m}^3\\text{m}}$}, "
+                                                  "respectively, for the four components.")
     }
   }
 }