I keep hitting the darn arrow keys. Until we can do something more
elegant like a real command history, this will at least keep me from
corrupting the display and input buffer.
Signed-off-by: Randall Spangler <rspangler@chromium.org>
BUG=none
TEST=type 'help' and some arrow keys, then enter. Should print help, not an error.
Change-Id: Idb552e9c22876fc2dc1f349f0038e94048f00aa7