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dracut-functions.sh: use builtin bash functions rather than tr
convert uppercase to lowercase using bash syntax
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@ -332,12 +332,12 @@ expand_persistent_dev() {
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;;
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UUID=*)
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_dev="${_dev#UUID=}"
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_dev="$(tr "[:upper:]" "[:lower:]" <<< "$_dev" )"
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_dev="${_dev,,}"
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_dev="/dev/disk/by-uuid/${_dev}"
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;;
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PARTUUID=*)
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_dev="${_dev#PARTUUID=}"
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_dev="$(tr "[:upper:]" "[:lower:]" <<< "$_dev" )"
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_dev="${_dev,,}"
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_dev="/dev/disk/by-partuuid/${_dev}"
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;;
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PARTLABEL=*)
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