@section @code{isxdigit}
@findex isxdigit
-POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/isxdigit.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/isxdigit.html}
Gnulib module: ---