[prettier-plugin-sh] Incorrect formatting breaks the script (zsh)

[korikhin]

Hi! I've encountered some issues formatting zsh flavoured script (*.zsh).

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• Completed

Describe the bug / provide steps to reproduce it

Suppose I want to check if some command exists with the script below:

#!/usr/bin/env zsh

if (( $+commands[cat] )); then
    echo "ok"
fi

After formatting You will see:

#!/usr/bin/env zsh

if (($ + commands[cat])); then
    echo "ok"
fi

This will raise an error:

./test.zsh:3: bad math expression: operand expected at '/bin/cat'

So You are forced to use quotation:

#!/usr/bin/env zsh

if (("$+commands[cat]")); then
    echo "ok"
fi

After formatting it still lacks padding spaces.

Desired behaviour: (( "$+commands[cat]" )) or (( $+commands[cat] ))

Thanks!