-n instead of ! -z
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@ -45,7 +45,7 @@ die () {
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code=1
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code=1
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fi
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fi
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# output message to stdout or stderr based on code
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# output message to stdout or stderr based on code
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if [ ! -z "${msg}" ]; then
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if [ -n "${msg}" ]; then
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if [ "${code}" -eq 0 ]; then
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if [ "${code}" -eq 0 ]; then
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printf "%s\\n" "${msg}"
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printf "%s\\n" "${msg}"
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else
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else
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