VisualMissionItemTest.h: Remove lost trailing spaces

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

src/MissionManager/VisualMissionItemTest.h

@@ -20,7 +20,7 @@
 class VisualMissionItemTest : public UnitTest
 {
     Q_OBJECT
-    
+
 public:
     VisualMissionItemTest(void);