Fix a word substitution typo ('and', not 'ad').

diff --git a/include/deal.II/dofs/dof_tools.h b/include/deal.II/dofs/dof_tools.h
index 7123a4ffbd844871d3bc723a27603a01a0d45db2..b627eeed71f1fce6d6c88a284a06f1febc9c6248 100644 (file)
--- a/include/deal.II/dofs/dof_tools.h
+++ b/include/deal.II/dofs/dof_tools.h
@@ -741,7 +741,7 @@ namespace DoFTools
    * the fine grid are not touched.
    *
    * The output of this function is a compressed format that can be given to
-   * the @p reinit functions of the SparsityPattern ad SparseMatrix classes.
+   * the @p reinit functions of the SparsityPattern and SparseMatrix classes.
    */
   template <int dim, int spacedim>
   void