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But '$*' does not breaking the arguments.

In short, when quoted breaking up the arguments if there are spaces in them.

is identical to the arguments received by the shell, the resulting list of words completely match what was given to the shell.

'$*' is a single word, comprising all the arguments to the shell, joined together with spaces.

Note on $* AND $* and when unquoted are identical and expand into the arguments.

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