[Help-bash] Is the actionable variable in a case statement POSIXly immune to word splitting?

[Chris Down]

Is the actionable variable in a case statement POSIXly immune to word
splitting? I looked at the POSIX spec and didn't see anything about it,
but it's quite possible that I just missed it in the rest of the text.
All shells that I've tested (bash, zsh, mksh, dash) seem to behave this
way.

    $ pacman -Q dash
    dash 0.5.7-4
    $ line='foo   bar'
    $ case $line in
    >     *) echo "$line"
    > esac
    foo   bar

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