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Revision 3405

Always output Usage messages to stderr and word-wrap them using `fold -s`

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row
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if ! test "$#" -eq 1; then
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    echo "Usage: env [n=...] $0 row_num <sheet >row_out
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Note: Row #s start with 1 after the header (which is row 0)"
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Note: Row #s start with 1 after the header (which is row 0)"|fold -s >&2
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    exit 2
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fi
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