Newline required at end of file with test statement

During the UI testing (see #84) I discovered that I was getting a parse error if the file ended with a "test" statement that didn't terminate with a newline. This may be a UI-only issue; more testing is necessary.

```
main() {
println("Hello, world")
}
test 1 + 2 == 3
```

```
line 4:13 missing EOL at ''
```