fix(_udevcmd): use param $2 of _parse_help

Author: akinomyoga

completions/_udevadm

@@ -69,7 +69,7 @@ _comp_cmd_udevadm()
 
     if [[ $cur == -* ]]; then
         COMPREPLY=($(compgen -W \
-            '$("$1" ${udevcmd-} --help 2>/dev/null | _parse_help -)' -- "$cur"))
+            '$(_parse_help "$1" "${udevcmd-} --help")' -- "$cur"))
         [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
     fi
 } &&