update documentation

diff --git a/include/deal.II/lac/trilinos_sparse_matrix.h b/include/deal.II/lac/trilinos_sparse_matrix.h
index f2de34c71a9322b5cf0f1c9e0db081e759fbad15..3fc27d1e6cc5e129bd4138aa1782a81ffe2f5dab 100644 (file)
--- a/include/deal.II/lac/trilinos_sparse_matrix.h
+++ b/include/deal.II/lac/trilinos_sparse_matrix.h
@@ -599,8 +599,9 @@ namespace TrilinosWrappers
     void reinit (const SparsityPattern &sparsity_pattern);
 
     /**
-     * This function copies the content in <tt>sparse_matrix</tt> to the
-     * calling matrix.
+     * This function copies the layout of @p sparse_matrix to the
+     * calling matrix. The values are not copied, but you can use
+     * copy_from() for this.
      *
      * This is a collective operation that needs to be called on all
      * processors in order to avoid a dead lock.