Cleanup for coding style

Add strict mode to check_style_guide script

include/openspace/util/task.h

@@ -41,7 +41,7 @@ public:
     virtual ~Task() = default;
     virtual void perform(const ProgressCallback& onProgress) = 0;
     virtual std::string description() = 0;
-    
+
     static std::unique_ptr<Task> createFromDictionary(
         const ghoul::Dictionary& dictionary
     );