Minor update to step-3.

diff --git a/examples/step-3/doc/results.dox b/examples/step-3/doc/results.dox
index f73bc56ae91ea82904e91267ff489ea1b12a0358..8318773512059cc7d39d6e77a15024da231bdd2f 100644 (file)
--- a/examples/step-3/doc/results.dox
+++ b/examples/step-3/doc/results.dox
@@ -125,21 +125,21 @@ suggestions:
   run the program.
 
   An alternative way to change the boundary indicator is to label
-  the boundaries by the cartesian coordinates of the face centers.
+  the boundaries based on 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-coordinates are within a tolerance
   (here 1e-12) of -1 and 1. Try this immediately after calling
-  <code>GridGenerator::hyper_cube</code>, as before:
+  GridGenerator::hyper_cube(), as before:
   @code
   for (const auto &cell : dof_handler.active_cell_iterators())
     {
         for (unsigned int face_number = 0;
              face_number < GeometryInfo<2>::faces_per_cell;
              ++face_number)
-          if ((std::fabs(cell->face(face_number)->center()(1) - (-1)) <
+          if ((std::fabs(cell->face(face_number)->center()(1) - (-1.0)) <
                1e-12) ||
-              (std::fabs(cell->face(face_number)->center()(1) - (1)) < 1e-12))
+              (std::fabs(cell->face(face_number)->center()(1) - (1.0)) < 1e-12))
             cell->face(face_number)->set_boundary_id(1);
     }
     @code