Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/debug-return-value.js

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 85 matching lines @@
             }
             break;
           default:
             fail("Unexpected");
         }
         exec_state.prepareStep(Debug.StepAction.StepIn, 1);
       } else {
         // Position at the end of the function.
         assertEquals(debugger_source_position + 50,
         exec_state.frame(0).sourcePosition());
-        
+
         // Just about to return from the function.
         assertTrue(exec_state.frame(0).isAtReturn())
         assertEquals(expected_return_value,
                      exec_state.frame(0).returnValue().value());
-        
+
         // Check the same using the JSON commands.
         var dcp = exec_state.debugCommandProcessor(false);
         var request = '{"seq":0,"type":"request","command":"backtrace"}';
         var resp = dcp.processDebugJSONRequest(request);
         response = new ParsedResponse(resp);
         frames = response.body().frames;
         assertTrue(frames[0].atReturn);
         assertEquals(expected_return_value,
                      response.lookup(frames[0].returnValue.ref).value);
-        
+
         listener_complete = true;
       }
     }
   } catch (e) {
     exception = e
   };
 };
 
 // Add the debug event listener.
 Debug.setListener(listener);
 
 // Four steps from the debugger statement in this function will position us at
 // the function return.
-//             0         1         2         3         4         5 
+//             0         1         2         3         4         5
 //             0123456789012345678901234567890123456789012345678901
 
 function f(x) {debugger; if (x) { return 1; } else { return 2; } };
 
 // Call f expecting different return values.
 break_count = 0;
 expected_return_value = 2;
 listener_complete = false;
 f();
 assertFalse(exception, "exception in listener")
 assertTrue(listener_complete);
 assertEquals(4, break_count);
 
 break_count = 0;
 expected_return_value = 1;
 listener_complete = false;
 f(true);
 assertFalse(exception, "exception in listener")
 assertTrue(listener_complete);
 assertEquals(4, break_count);
 
 break_count = 0;
 expected_return_value = 2;
 listener_complete = false;
 f(false);
 assertFalse(exception, "exception in listener")
 assertTrue(listener_complete);
 assertEquals(4, break_count);