gnucompability(xargs): when a filename contain an ascii space, it leads to an error

[HackingRepo]

Hi, findutils mainteners

that looks to me a capability issue, i see

relunsec@relunsec:~/software/findutils/target/debug$ echo -n " " > a.txt
relunsec@relunsec:~/software/findutils/target/debug$ sudo ./xargs -a a.txt ls
ls: cannot access '': No such file or directory
relunsec@relunsec:~/software/findutils/target/debug$ sudo /bin/xargs -a a.txt ls
a.txt  build  deps  examples  find  find.d  incremental	 libfindutils.d	 libfindutils.rlib  locate  locate.d  testing-commandline  testing-commandline.d  updatedb  updatedb.d	xargs  xargs.d
relunsec@relunsec:~/software/findutils/target/debug$ sudo ./xargs -a a.txt echo

relunsec@relunsec:~/software/findutils/target/debug$ sudo /bin/xargs -a a.txt echo

relunsec@relunsec:~/software/findutils/target/debug$ sudo ./xargs -a a.txt echo | xxd
00000000: 0a                                       .
relunsec@relunsec:~/software/findutils/target/debug$ sudo /bin/xargs -a a.txt echo | xxd
00000000: 0a                                       .
relunsec@relunsec:~/software/findutils/target/debug$ 

when doing an echo normal, but when ls no, while the gnu one xargs correctly interept that