add some empty lines

diff --git a/include/deal.II/algorithms/operator.h b/include/deal.II/algorithms/operator.h
index 6a879ab637e29884ef887c78394b6f60f176f5a5..b1566b5b8022128599ffc13297d8f3ba34566ad2 100644 (file)
--- a/include/deal.II/algorithms/operator.h
+++ b/include/deal.II/algorithms/operator.h
@@ -88,6 +88,7 @@ namespace Algorithms
      */
     virtual void
     notify(const Event &);
+
     /**
      * Clear all #notifications.
      */
@@ -134,11 +135,13 @@ namespace Algorithms
      */
     void
     initialize_stream(std::ostream &stream);
+
     /**
      * Set the current step.
      */
     void
     set_step(const unsigned int step);
+
     /**
      * Output all the vectors in AnyData.
      */