xargs will put several arguments on one command line. To limit it to one argument at a time, use the
$ seq 3 | xargs -n 1 echo
Use at most max-args arguments per command line. Fewer than max-args arguments will be used if the
size (see the -s option) is exceeded, unless the -x option is given, in which case xargs will exit.
-L is similar but has an extra feature: unlike
-n, lines with trailing blanks are continued onto the next line. Observe:
$ echo $'1 \n2\n3\n4'
$ echo $'1 \n2\n3\n4' | xargs -L 1 echo
$ echo $'1 \n2\n3\n4' | xargs -n 1 echo