No code assist in REPL

```
What steps will reproduce the problem?
1. Fire up some project and its REPL
2. Open a paren to write some code
3. Press CTRL-Space

Before version STABLE 31.1, a window with code assist was displayed to the 
user. At the moment that window does not show up anymore.

```

Original issue reported on code.google.com by `andrea.r...@gmail.com` on 5 Dec 2014 at 3:18
