removed trailing spaces

samples/cpp/tutorial_code/viz/launching_viz.cpp

@@ -33,33 +33,33 @@ int main()
     help();
     /// Create a window
     viz::Viz3d myWindow("Viz Demo");
-    
+
     /// Start event loop
     myWindow.spin();
-    
+
     /// Event loop is over when pressed q, Q, e, E
     cout << "First event loop is over" << endl;
-    
+
     /// Access window via its name
     viz::Viz3d sameWindow = viz::get("Viz Demo");
-    
+
     /// Start event loop
     sameWindow.spin();
-    
+
     /// Event loop is over when pressed q, Q, e, E
     cout << "Second event loop is over" << endl;
-    
+
     /// Event loop is over when pressed q, Q, e, E
     /// Start event loop once for 1 millisecond
     sameWindow.spinOnce(1, true);
     while(!sameWindow.wasStopped())
     {
         /// Interact with window
-        
+
         /// Event loop for 1 millisecond
         sameWindow.spinOnce(1, true);
     }
-    
+
     /// Once more event loop is stopped
     cout << "Last event loop is over" << endl;
     return 0;