Update microstrip.pro

Electrostatics/microstrip.pro

@@ -186,7 +186,7 @@ Formulation {
      holds for all v', where Bnd_Vol_Ele is the boundary of Vol_Ele. In our
      microstrip example this surface term vanishes, as there is either no test
      function v' (on the Dirichlet boundary), or "epsilon n.Grad v" is zero
-     (on the homogeneous Neumann boundary. We are thus eventually looking for
+     (on the homogeneous Neumann boundary). We are thus eventually looking for
      functions v in the function space Hgrad_v_Ele such that
 
      (epsilon Grad v, Grad v')_Vol_Ele = 0
@@ -236,7 +236,7 @@ Formulation {
      Another option, which would not work here, is to evaluate the first
      argument with the last available already computed solution, i.e. simply
      perform the interpolation with known coefficients vn_k. For this the Dof
-     prefix operator would be omitted and we would have:
+     prefix would be omitted and we would have:
 
      [ epsilon[] * {d v} , {d v} ],
 
@@ -245,6 +245,7 @@ Formulation {
 
      Both choices are commonly used in different contexts, and we shall come
      back on this often in subsequent tutorials. */
+     
   { Name Electrostatics_v; Type FemEquation;
     Quantity {
       { Name v; Type Local; NameOfSpace Hgrad_v_Ele; }