Add return 0 and whitespace

Isosurfacing_3/examples/Isosurfacing_3/all_cartesian_cube.cpp

@@ -77,4 +77,6 @@ int main() {
     // save output indexed meshes to files, in the OFF format
     CGAL::IO::write_OFF("result_mc.off", points_mc, polygons_mc);
     CGAL::IO::write_OFF("result_dc.off", points_dc, polygons_dc);
+
+    return 0;
 }

Isosurfacing_3/examples/Isosurfacing_3/dual_contouring_cartesian_grid.cpp

@@ -53,4 +53,6 @@ int main() {
 
     // write output indexed surface mesh to file, in OFF format
     CGAL::IO::write_OFF("result.off", points, polygons);
+
+    return 0;
 }

Isosurfacing_3/examples/Isosurfacing_3/dual_contouring_implicit_iwp.cpp

@@ -54,4 +54,6 @@ int main() {
 
     // save the result in the OFF format
     CGAL::IO::write_OFF("result.off", points, polygons);
+
+    return 0;
 }

Isosurfacing_3/examples/Isosurfacing_3/dual_contouring_mesh_offset.cpp

@@ -71,4 +71,6 @@ int main() {
 
     // save output indexed mesh to a file, in the OFF format
     CGAL::IO::write_OFF("result.off", points, polygons);
+
+    return 0;
 }

Isosurfacing_3/examples/Isosurfacing_3/dual_contouring_octree.cpp

@@ -83,4 +83,6 @@ int main() {
     CGAL::Isosurfacing::dual_contouring(domain, 0.8, points, polygons);
 
     CGAL::IO::write_OFF("result.off", points, polygons);
+
+    return 0;
 }

Isosurfacing_3/examples/Isosurfacing_3/marching_cubes_cartesian_grid_sphere.cpp

@@ -46,4 +46,6 @@ int main() {
 
     // save output indexed surface mesh to file, in the OFF format
     CGAL::IO::write_OFF("result.off", points, polygons);
+
+    return 0;
 }

Isosurfacing_3/examples/Isosurfacing_3/marching_cubes_implicit_sphere.cpp

@@ -32,4 +32,6 @@ int main() {
 
     // save ouput indexed mesh to a file, in the OFF format
     CGAL::IO::write_OFF("result.off", points, polygons);
+
+    return 0;
 }

Isosurfacing_3/examples/Isosurfacing_3/marching_cubes_inrimage.cpp

@@ -37,4 +37,6 @@ int main() {
 
     // save output indexed mesh to a file, in the OFF format
     CGAL::IO::write_OFF("result.off", points, polygons);
+
+    return 0;
 }

Isosurfacing_3/examples/Isosurfacing_3/marching_cubes_signed_mesh_offset.cpp

@@ -94,4 +94,6 @@ int main() {
 
     // save output indexed triangle soup to a file, in the OFF format
     CGAL::IO::write_OFF("output.off", points, polygons);
+
+    return 0;
 }

Isosurfacing_3/test/Isosurfacing_3/Timer.h

@@ -1,5 +1,5 @@
-#ifndef CGAL_TIMER_H
-#define CGAL_TIMER_H
+#ifndef SCOPE_TIMER_H
+#define SCOPE_TIMER_H
 
 #include <chrono>
 #include <iostream>
@@ -35,4 +35,4 @@ private:
     bool running;
 };
 
-#endif  // CGAL_TIMER_H
+#endif  // SCOPE_TIMER_H

Isosurfacing_3/test/Isosurfacing_3/test_dual_contouring.cpp

@@ -78,4 +78,6 @@ int main() {
 
     // CGAL::IO::write_OFF("result.off", mesh);
     CGAL::IO::write_OFF("result.off", points, polygons);
+
+    return 0;
 }

Isosurfacing_3/test/Isosurfacing_3/test_marching_cubes.cpp

@@ -91,4 +91,6 @@ int main() {
     test_grid_sphere(100);
 
     std::cout << "All tests passed" << std::endl;
+
+    return 0;
 }