#if defined GNULIB_ARGP_DISABLE_DIRNAME
# define __argp_base_name(arg) arg
#elif defined GNULIB_ARGP_EXTERN_BASENAME
-extern char *__argp_base_name(const char *arg);
+extern char *__argp_base_name (const char *arg);
#else
# include "dirname.h"
# define __argp_base_name last_component