document sundials namespace

otherwise it doesn't appear in doxygen.

diff --git a/include/deal.II/sundials/arkode.h b/include/deal.II/sundials/arkode.h
index bb5c8e73d3ea17817ff4a6e202c6769c4cc5e9d3..3a9f8cbfbc81a920f6171742ccfa1e111caa3e1b 100644 (file)
--- a/include/deal.II/sundials/arkode.h
+++ b/include/deal.II/sundials/arkode.h
@@ -52,6 +52,9 @@ DEAL_II_NAMESPACE_OPEN
 // Shorthand notation for ARKODE error codes.
 #define AssertARKode(code) Assert(code >= 0, ExcARKodeError(code))
 
+/**
+ * A namespace for dealing with ODE solvers through the SUNDIALS package.
+ */
 namespace SUNDIALS
 {
   /**