From c849808eacc26116f88e9d066e2de836218ebc65 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Wed, 7 Jul 2021 17:11:55 -0600
Subject: [PATCH] Don't use references where necessary.

---
 include/deal.II/base/bounding_box.h | 4 ++--
 source/base/bounding_box.cc         | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/deal.II/base/bounding_box.h b/include/deal.II/base/bounding_box.h
index 045a2a0f21..2964fef076 100644
--- a/include/deal.II/base/bounding_box.h
+++ b/include/deal.II/base/bounding_box.h
@@ -218,7 +218,7 @@ public:
    * an assertion.
    */
   void
-  extend(const Number &amount);
+  extend(const Number amount);
 
   /**
    * Compute the volume (i.e. the dim-dimensional measure) of the BoundingBox.
@@ -487,7 +487,7 @@ operator!=(const BoundingBox<spacedim, Number> &box) const
 
 template <int spacedim, typename Number>
 inline void
-BoundingBox<spacedim, Number>::extend(const Number &amount)
+BoundingBox<spacedim, Number>::extend(const Number amount)
 {
   for (unsigned int d = 0; d < spacedim; ++d)
     {
diff --git a/source/base/bounding_box.cc b/source/base/bounding_box.cc
index 30c789d179..bf97f863c4 100644
--- a/source/base/bounding_box.cc
+++ b/source/base/bounding_box.cc
@@ -39,6 +39,8 @@ BoundingBox<spacedim, Number>::point_inside(const Point<spacedim, Number> &p,
   return true;
 }
 
+
+
 template <int spacedim, typename Number>
 void
 BoundingBox<spacedim, Number>::merge_with(
@@ -55,6 +57,8 @@ BoundingBox<spacedim, Number>::merge_with(
     }
 }
 
+
+
 template <int spacedim, typename Number>
 NeighborType
 BoundingBox<spacedim, Number>::get_neighbor_type(
-- 
2.39.5