math mode change

Co-Authored-By: David Wells <drwells@email.unc.edu>

diff --git a/include/deal.II/grid/grid_generator.h b/include/deal.II/grid/grid_generator.h
index 010aec70be2b6e73e3dde71ec800a6022a2b406b..1c51c127dc375bc05136cb8d8a6f6da4e3116152 100644 (file)
--- a/include/deal.II/grid/grid_generator.h
+++ b/include/deal.II/grid/grid_generator.h
@@ -1224,7 +1224,7 @@ namespace GridGenerator
    * @param tria        The triangulation to be worked on.
    * @param n_cells     The number of cells in the loop. Must be greater than
    * 4.
-   * @param n_rotations The number of rotations ($\pi$/2 each) to be performed
+   * @param n_rotations The number of rotations ($\pi/2$ each) to be performed
    * before gluing the loop together.
    * @param R           The radius of the circle, which forms the middle line
    * of the torus containing the loop of cells. Must be greater than @p r.