fix doxygen GridGenerator plate_with_a_hole imgs

fixes #7406
fixes #7437

diff --git a/include/deal.II/grid/grid_generator.h b/include/deal.II/grid/grid_generator.h
index be666c87edd410e83ba480dc93d8b6bd4f42fb9a..661d9cc5771beef9adb55875a0d2fee16a74de9e 100644 (file)
--- a/include/deal.II/grid/grid_generator.h
+++ b/include/deal.II/grid/grid_generator.h
@@ -333,8 +333,12 @@ namespace GridGenerator
    * Here is the non-symmetric grid (after one global refinement, colored
    * according to manifold id) in 2D and 3D, respectively:
    *
-   * <img src="plate_with_a_hole.png" title="2d plate" width="600px">
-   * <img src="plate_with_a_hole_3D.png" title="3d plate" width="600px">
+   * \htmlonly <style>div.image
+   * img[src="plate_with_a_hole.png"]{width:25%;}</style> \endhtmlonly
+   * @image html plate_with_a_hole.png
+   * \htmlonly <style>div.image
+   * img[src="plate_with_a_hole_3D.png"]{width:25%;}</style> \endhtmlonly
+   * @image html plate_with_a_hole_3D.png
    *
    * In 3D, triangulation will be extruded in the z-direction by the total
    * height of @p L using @p n_slices slices (minimum is 2).