Change C license style

test/c/ctest_util_arithmetic_expr.cpp

-/* ICON
- *
- * ---------------------------------------------------------------
- * Copyright (C) 2004-2024, DWD, MPI-M, DKRZ, KIT, ETH, MeteoSwiss
- * Contact information: icon-model.org
- *
- * See AUTHORS.TXT for a list of authors
- * See LICENSES/ for license information
- * SPDX-License-Identifier: BSD-3-Clause
- * --------------------------------------------------------------- */
+// ICON
+//
+// ---------------------------------------------------------------
+// Copyright (C) 2004-2024, DWD, MPI-M, DKRZ, KIT, ETH, MeteoSwiss
+// Contact information: icon-model.org
+//
+// See AUTHORS.TXT for a list of authors
+// See LICENSES/ for license information
+// SPDX-License-Identifier: BSD-3-Clause
+// ---------------------------------------------------------------
 #include <gtest/gtest.h>
 
 #include <util_arithmetic_expr.h>

test/c/ctest_util_file.cpp

-/* ICON
- *
- * ---------------------------------------------------------------
- * Copyright (C) 2004-2024, DWD, MPI-M, DKRZ, KIT, ETH, MeteoSwiss
- * Contact information: icon-model.org
- *
- * See AUTHORS.TXT for a list of authors
- * See LICENSES/ for license information
- * SPDX-License-Identifier: BSD-3-Clause
- * --------------------------------------------------------------- */
+// ICON
+//
+// ---------------------------------------------------------------
+// Copyright (C) 2004-2024, DWD, MPI-M, DKRZ, KIT, ETH, MeteoSwiss
+// Contact information: icon-model.org
+//
+// See AUTHORS.TXT for a list of authors
+// See LICENSES/ for license information
+// SPDX-License-Identifier: BSD-3-Clause
+// ---------------------------------------------------------------
 #include <gtest/gtest.h>
 
 #include <string>

test/c/ctest_util_hash.cpp

-/* ICON
- *
- * ---------------------------------------------------------------
- * Copyright (C) 2004-2024, DWD, MPI-M, DKRZ, KIT, ETH, MeteoSwiss
- * Contact information: icon-model.org
- *
- * See AUTHORS.TXT for a list of authors
- * See LICENSES/ for license information
- * SPDX-License-Identifier: BSD-3-Clause
- * --------------------------------------------------------------- */
+// ICON
+//
+// ---------------------------------------------------------------
+// Copyright (C) 2004-2024, DWD, MPI-M, DKRZ, KIT, ETH, MeteoSwiss
+// Contact information: icon-model.org
+//
+// See AUTHORS.TXT for a list of authors
+// See LICENSES/ for license information
+// SPDX-License-Identifier: BSD-3-Clause
+// ---------------------------------------------------------------
 #include <gtest/gtest.h>
 
 #include <stdexcept>