(Re)-binding \cj breaks enter key

I wanted to have vim key mappings instead of the arrows with the following commands:

```
bind \ch 'backward-char'
bind \cl 'forward-char'
bind \ck 'up-or-search'
bind \cj 'down-or-search'
```

Which seems to work great, except that because of re-binding of the `\cj` key combination, the `enter` key stopped working.

Is that intended behavior or a bug?
