Disable clang-format for catch.hpp

Do not impose formatting rules on imported code.

Author: tautschnig

unit/catch/catch.hpp

@@ -8,6 +8,14 @@
  *  Distributed under the Boost Software License, Version 1.0. (See accompanying
  *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  */
+
+#ifndef INCLUDED_VIA_USE_CATCH_H
+#error Do not include this file directly, use use_catch.h instead
+#endif
+
+// this is imported code, don't impose formatting rules
+// clang-format off
+
 #ifndef TWOBLUECUBES_SINGLE_INCLUDE_CATCH_HPP_INCLUDED
 #define TWOBLUECUBES_SINGLE_INCLUDE_CATCH_HPP_INCLUDED
 
@@ -11418,3 +11426,4 @@ using Catch::Detail::Approx;
 
 #endif // TWOBLUECUBES_SINGLE_INCLUDE_CATCH_HPP_INCLUDED
 
+// clang-format on