Similarly, Gnulib has a facility for executing a command in a
subprocess. It is at the same time a portability enhancement (it
-works on GNU/Unix and Windows, compared to the classical
+works on GNU, Unix, and Windows, compared to the classical
@code{fork()}/@code{exec()} which is not portable to Windows), as well
as an application aid: it takes care of redirecting stdin and/or
stdout if desired, and emits an error message if the subprocess