Description of problem:
when my terminal is 80 columns wide, and the command is longer than
80 chars, the line will be wrapped automatically, but the wrapped line
(the line above the current one) cannot be edited.


Version-Release number of selected component (if applicable):
qemu-kvm-0.12.1.2-2.71.el6.x86_64


How reproducible:
100%


Steps to Reproduce:
1. start a vm ussing qemu-kvm with option "-monitor stdio",
e.g.
qemu-kvm -name 'vm1' -monitor stdio -drive file=./win7-32-virtio.qcow2,if=virtio,cache=none,boot=on -net nic,vlan=0,model=virtio,macaddr=02:30:20:EC:31:c2 -net tap,vlan=0,ifname=virtio_0_6001,script=/root/autotest/client/tests/kvm/scripts/qemu-ifup-switch,downscript=no -m 4096 -smp 2  -soundhw ac97 -redir tcp:5000::22 -vnc :0 -usbdevice tablet -rtc-td-hack  -cpu qemu64,+sse2 -no-kvm-pit-reinjection -serial unix:/tmp/serial-20100608-115414-Avvj,server,nowait

2. make sure the terminal is narrower than the fllowing command, e.g. just 80 columns wide, so that the following command will be wrapped while typing, and 
then type (qemu) command (without type "Enter"),

change ide0-cd0 /home/kvm_autotest_root/iso/ISO/Windows7/en_windows_7_ultchange ide0-cd0 /home/kvm_autotest_root/iso/ISsO/Windows7/en_windows_7_ultimate_x86_dvd_x15-65921.iso


3. try to change the cdrom number, i.e. change "ide0-cd0" to "ide0-cd1",

  
Actual results:
cannot move the cursor to the desired place (ide0-cd0) by pressing
the left-arrow


Expected results:
user can move the cursor to the wrapped line by pressing
the left-arrow


Additional info:
[root@dhcp-0-1 ISO]# rpm -qa |grep qemu
qemu-kvm-tools-0.12.1.2-2.69.el6.x86_64
gpxe-roms-qemu-0.9.7-6.3.el6.noarch
qemu-img-0.12.1.2-2.69.el6.x86_64
qemu-kvm-0.12.1.2-2.69.el6.x86_64