[cleanup] comment local residual in exercise-mainfile, improve description in mainfile

exercises/exercise-mainfile/1pproblem.hh

@@ -38,7 +38,7 @@
 
 // TODO: dumux-course-task
 // uncomment the incompressiblelocalresidual which is a specialization of the standard immisible localresidual for one phase incompressible cases and provides an analytic jacobian.
-#include <dumux/porousmediumflow/1p/incompressiblelocalresidual.hh>
+// #include <dumux/porousmediumflow/1p/incompressiblelocalresidual.hh>
 
 #include <dumux/porousmediumflow/problem.hh>
 #include <dumux/porousmediumflow/1p/model.hh>
@@ -84,8 +84,8 @@ public:
 
 // TODO: dumux-course-task
 // set the OneP Incompressible local residual for the OnePIncompressible type tag. This provides an analytic jacobian to be used for the analytic solution. Change that by setting:
-template<class TypeTag>
-struct LocalResidual<TypeTag, TTag::OnePIncompressible> { using type = OnePIncompressibleLocalResidual<TypeTag>; };
+// template<class TypeTag>
+// struct LocalResidual<TypeTag, TTag::OnePIncompressible> { using type = OnePIncompressibleLocalResidual<TypeTag>; };
 
 
 // the fluid system for compressible tests

exercises/exercise-mainfile/README.md

@@ -185,6 +185,6 @@ For the incompressible one phase problem it is possible to also have an analytic
 ```c++
 // TODO: dumux-course-task
 ```
-For the analytic solution of your immiscible problem you need analytic solutions for the derivatives of the jacobian. For that we have a special local residual, the `OnePIncompressibleLocalResidual` which provides that. You just need to include that in your `1pproblem.hh` and use that instead of the `immisciblelocalresidual.hh` which is used as a standard for all immiscible models.
+For the analytic solution of your immiscible problem you need analytic solutions for the derivatives of the jacobian. For that we have a special local residual, the `OnePIncompressibleLocalResidual` which provides that. You just need to include `incompressiblelocalresidual.hh` in your `1pproblem.hh` and use that instead of the `immisciblelocalresidual.hh` which is used as a standard for all immiscible models.
 
 Additionally you need to set the differentiation method in the main file `exercise_1p_a.cc` to analytic.