[Bug 12776] $@ containing quoted string is split into separate arguments

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=12776

--- Comment #2 from Marius <marius at psihoexpert.ro> ---
Yes, it works, but I don't understand. Can you explain?

In my view, inside "script.sh 1 2 3", $@ expands into 3 elements:
1 2 3
while "$@" expands inside the quotes creating just one element:
"1 2 3"

So, after it's expanded,
for i in 1 2 3 ; do echo $i ; done
outputs:
1
2
3

and
for i in "1 2 3" ; do echo $i ; done
outputs:
1 2 3

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