Merge branch 'cleanup/dumuxheaders' into 'master'

[Cleanup] Delete clutter after header guards

See merge request !104

exercises/solution/exercise-fractures/matrixproblem.hh

@@ -231,4 +231,4 @@ private:
 
 } // end namespace Dumux
 
-#endif // DUMUX_COURSE_FRACTURESEXERCISE_MATRIX_PROBLEM_HH
+#endif

exercises/solution/exercise-fractures/properties.hh

@@ -108,4 +108,4 @@ struct FluidSystem<TypeTag, TTag::FractureProblem>
 
 } // end namespace Dumux::Properties
 
-#endif // DUMUX_COURSE_FRACTURESEXERCISE_PROPERTIES_HH
+#endif