fixed copyright years, removed cross section tuple

Processes/QGSJetII/Interaction.cc

 /*
- * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
+ * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.
  *
@@ -64,7 +64,7 @@ namespace corsika::process::qgsjetII {
     }
   }
 
-  tuple<units::si::CrossSectionType, units::si::CrossSectionType>
+  units::si::CrossSectionType
   Interaction::GetCrossSection(const particles::Code BeamId,
                                const particles::Code TargetId,
                                const units::si::HEPEnergyType CoMenergy,
@@ -106,7 +106,7 @@ namespace corsika::process::qgsjetII {
       sigProd = qgsect_(dEcm, iBeam, iProjectile, iTarget);
     }
 
-    return std::make_tuple(sigProd * 1_mb, 0_mb);
+    return sigProd * 1_mb;
   }
 
   template <>

Processes/QGSJetII/Interaction.h

 /*
- * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
+ * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.
  *
@@ -17,7 +17,6 @@
 #include <corsika/units/PhysicalUnits.h>
 
 #include <string>
-#include <tuple>
 
 namespace corsika::process::qgsjetII {
 
@@ -45,7 +44,7 @@ namespace corsika::process::qgsjetII {
              corsika::particles::IsNucleus(TargetId);
     }
 
-    std::tuple<corsika::units::si::CrossSectionType, corsika::units::si::CrossSectionType>
+    corsika::units::si::CrossSectionType
     GetCrossSection(const corsika::particles::Code, const corsika::particles::Code,
                     const corsika::units::si::HEPEnergyType, const unsigned int Abeam = 0,
                     const unsigned int Atarget = 0) const;

Processes/QGSJetII/ParticleConversion.cc

 /*
- * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
+ * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.
  *

Processes/QGSJetII/ParticleConversion.h

 /*
- * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
+ * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.
  *

Processes/QGSJetII/QGSJetIIFragmentsStack.h

 /*
- * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
+ * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.
  *

Processes/QGSJetII/QGSJetIIStack.h

 /*
- * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
+ * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.
  *

Processes/QGSJetII/code_generator.py

 #!/usr/bin/env python3
 
-# (c) Copyright 2018-2019 CORSIKA Project, corsika-project@lists.kit.edu
+# (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
 #
 # See file AUTHORS for a list of contributors.
 #

Processes/QGSJetII/qgsjet-II-04.cc

 /*
- * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
+ * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.
  *

Processes/QGSJetII/qgsjet-II-04.h

 /*
- * (c) Copyright 2019 CORSIKA Project, corsika-project@lists.kit.edu
+ * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.
  *

Processes/QGSJetII/testQGSJetII.cc

 /*
- * (c) Copyright 2019 CORSIKA Project, corsika-project@lists.kit.edu
+ * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.
  *