From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Sat, 5 Aug 2023 10:12:27 +0000 (-0600)
Subject: Fix a warning in a test.
X-Git-Tag: relicensing~617^2~3
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b15ebad4e9a052943d5892e960b8ed9c2e08519e;p=dealii.git

Fix a warning in a test.
---

diff --git a/tests/grid/grid_generator_plate_with_a_hole_4.cc b/tests/grid/grid_generator_plate_with_a_hole_4.cc
index fc798b2fe1..55acd8ecd3 100644
--- a/tests/grid/grid_generator_plate_with_a_hole_4.cc
+++ b/tests/grid/grid_generator_plate_with_a_hole_4.cc
@@ -68,7 +68,7 @@ test()
               return std::get<2>(t1) < std::get<2>(t2);
             });
 
-  for (const auto el : boundary_faces)
+  for (const auto & el : boundary_faces)
     deallog << "center: " << std::get<0>(el)
             << " boundary id: " << std::get<1>(el)
             << " manifold id: " << std::get<2>(el) << std::endl;