Fixed typos on step-3 extension.

diff --git a/examples/step-3/doc/results.dox b/examples/step-3/doc/results.dox
index 2f5764aa632d453e1443677d9c7bc054a3786929..8d8522e7c17f4d509bd6ba6e34f1fedbfe4b7c61 100644 (file)
--- a/examples/step-3/doc/results.dox
+++ b/examples/step-3/doc/results.dox
@@ -125,16 +125,15 @@ suggestions:
   run the program.
 
   An alternative way to change the boundary indicator is to label
-  the boundaries by the cartesian coordinates of the cell centers.
+  the boundaries by the cartesian coordinates of the face centers.
   For example, we can label all of the cells along the top and
   bottom boundaries with a boundary indicator 1 by checking to
-  see if the cell centers' y-coordiantes are within a tolerance
+  see if the cell centers' y-coordinates are within a tolerance
   (here 1e-12) of -1 and 1. Try this immediately after calling
   <code>GridGenerator::hyper_cube</code>, as before:
   @code
   for (; cell != endc; ++cell)
     {
-      {
         for (unsigned int face_number = 0;
              face_number < GeometryInfo<2>::faces_per_cell;
              ++face_number)
@@ -142,7 +141,6 @@ suggestions:
                1e-12) ||
               (std::fabs(cell->face(face_number)->center()(1) - (1)) < 1e-12))
             cell->face(face_number)->set_boundary_id(1);
-      }
     }
     @code
     Although this code is significantly longer than before, it is