avoid changing "pollcdrom" to "cdrom" in dracut config

lxqt.ks

@@ -62,9 +62,11 @@ find /boot -name 'vmlinuz-*' | sort -u | while read -r line ; do
 			not_exist_list="${not_exist_list} ${i}"
 		fi
 	done
+	sed -i -e 's,=",=" ,g' "$C"
 	for i in ${not_exist_list} ; do
-		sed -i -E -e "s,([[:blank:]])*${i}[[:blank:]], ,g" "$C"
+		sed -i -E -e "s,[[:blank:]]${i}[[:blank:]], ,g" "$C"
 	done
+	sed -i -e 's,  , ,g' "$C"
 	diff -u "${C}.orig" "${C}" || :
 	rm -f "${C}.orig"
 	dracut -f "/boot/initrd-${kver}.img" "${kver}"