Plus I'm not sure that
'-I REPLACE-STR'
'--replace[=REPLACE-STR]'
'-i[REPLACE-STR]'
Replace occurrences of REPLACE-STR in the initial arguments with
names read from standard input. Also, unquoted blanks do not
terminate arguments; instead, the input is split at newlines only.
If REPLACE-STR is omitted (omitting it is allowed only for '-i'),
it defaults to '{}' (like for 'find -exec'). Implies '-x' and '-l
1'. The '-i' option is deprecated in favour of the '-I' option.
is enough to make it clear that
$ echo a b c|xargs -I{} echo x {} y {} z {}
will make
x a b c y a b c z a b c
and not
x a b y z c
Nor does it mention that one is actually doing
echo x 'a b c' y 'a b c' z 'a b c'
and not just
echo x a b c y a b c z a b c
