minor coding style change

src/OpenVolumeMesh/Core/Iterators.hh

@@ -142,14 +142,14 @@ using is_ovm_iterator = std::is_base_of<BaseIterator<typename std::remove_const<
 // so we can use range-for, e.g. for(const auto &vh: mesh.vertices()) works.
 template<class I>
 typename std::enable_if<is_ovm_iterator<I>::value, I>::type
-begin(const std::pair<I, I> &iterpair)
+begin(const std::pair<I, I>& iterpair)
 {
     return iterpair.first;
 }
 
 template<class I>
 typename std::enable_if<is_ovm_iterator<I>::value, I>::type
-end(const std::pair<I, I> &iterpair)
+end(const std::pair<I, I>& iterpair)
 {
     return iterpair.second;
 }

src/Unittests/unittests_iterators.cc

@@ -26,8 +26,8 @@ TEST_F(HexahedralMeshBase, HexVertexIterTest) {
 TEST_F(HexahedralMeshBase, RangeForTest) {
     // no EXPECTs here, if it compiles, it'll work.
     generateHexahedralMesh(mesh_);
-    for (const auto &vh: mesh_.vertices()) {}
-    const auto &constref = mesh_;
-    for (const auto &vh: constref.vertices()) {}
+    for (const auto& vh: mesh_.vertices()) {}
+    const auto& constref = mesh_;
+    for (const auto& vh: constref.vertices()) {}
 }
 #endif