High battery drainage Xperia 10 III

Bug Reports
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251

ok, I open the file like this:
[root@Xperia10III defaultuser]# visudo /etc/sudoers

and try to add the line:
echo 0 > /sys/devices/system/cpu/cpu2/online

Try to write, I get the error:

[root@Xperia10III Downloads]# visudo /etc/sudoers
/etc/sudoers:1:8: syntax error
echo 0 > /sys/devices/system/cpu/cpu2/online
       ^

How could I fit this?