Remove a ProblemBase doc reference.

ProblemBase was removed a long time ago (commit 57dc4ec4a3, March
2001), so point the user towards the current functions.

diff --git a/include/deal.II/numerics/matrix_tools.h b/include/deal.II/numerics/matrix_tools.h
index a9b6950024b013a31657020c1121a696be95c76f..d0e0c19160976a77af15f2e0a6a23db897dd2f06 100644 (file)
--- a/include/deal.II/numerics/matrix_tools.h
+++ b/include/deal.II/numerics/matrix_tools.h
@@ -132,7 +132,8 @@ namespace TrilinosWrappers
  * If you want to use boundary conditions with the matrices generated by the
  * functions of this namespace in addition to the ones in a possible
  * constraint matrix, you have to use a function like
- * <tt>ProblemBase<>::apply_dirichlet_bc</tt> to matrix and right hand side.
+ * <tt>apply_boundary_values</tt> with the matrix, solution, and right hand
+ * side.
  *
  *
  * <h3>Supported matrices</h3>