ClangFormat: apply to source, most of intern

Apply clang format as proposed in T53211.

For details on usage and instructions for migrating branches
without conflicts, see:

https://wiki.blender.org/wiki/Tools/ClangFormat

source/blender/python/intern/bpy_traceback.h

@@ -18,10 +18,9 @@
  * \ingroup pythonintern
  */
 
-
 #ifndef __BPY_TRACEBACK_H__
 #define __BPY_TRACEBACK_H__
 
 void python_script_error_jump(const char *filepath, int *lineno, int *offset);
 
-#endif  /* __BPY_TRACEBACK_H__ */
+#endif /* __BPY_TRACEBACK_H__ */