refactor(Core/Game): restyle game lib with astyle (#3466)

src/server/game/Handlers/AddonHandler.h

@@ -18,7 +18,7 @@ public:
     ~AddonHandler();
 
     static AddonHandler* instance();
-    
+
     //build addon packet
     bool BuildAddonPacket(WorldPacket* Source, WorldPacket* Target);
 };