remove double-line from copyright message

COAST/COASTProcess.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

COAST/COASTProcess.h

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

COAST/COASTStack.h

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

COAST/COASTUserLib.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

COAST/ParticleConversion.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

COAST/ParticleConversion.h

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/boundary_example.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/cascade_example.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/cascade_proton_example.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/geometry_example.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/helix_example.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/logger_example.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/particle_list_example.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/stack_example.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/staticsequence_example.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/stopping_power.cc

 /*
  * (c) Copyright 2019 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Documentation/Examples/vertical_EAS.cc

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Environment/BaseExponential.h

-
 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.
  */
 
+
 #pragma once
 
 #include <corsika/geometry/Line.h>

Environment/DensityFunction.h

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.

Environment/Environment.h

 /*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
- *
  * This software is distributed under the terms of the GNU General Public
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.