Pavel Raiskup dixit:

>ShellCheck dislikes unused variables in 'read unused_var', rather
>use 'read _'.

That’s bad advice. It’s better to name the fields,
even if the variables themselves may be unused, to
easen later maintenance.

FWIW, I'm quite impressed with mksh interactively. I thought it was much
*much* more bare bones. But it turns out it beats the living hell out of
ksh93 in that respect. I'd even consider it for my daily use if I hadn't
wasted half my life on my zsh setup. :-) -- Frank Terbeck in #!/bin/mksh

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