Vim – Terminal timeout tip/trick interferes with other mappings

The autocommand group on the “Tips & Tricks” page to *“Fix terminal timeout when pressing escape”* ([found here](http://git.io/v_w_5Q)) causes some mappings not to work.

For example, these don't work when the snippet is included in my vimrc:
```
inoremap jk <Esc>
inoremap jj <Esc>
```

Cheers,
Matt