Add space to console input

This is a simple change with a space at the end of the console reader. This is standard Bukkit and Minecraft behavior, and changes the session from this:
```
>whitelist off
whitelist off
11:55:52 [INFO] CONSOLE: Turned off white-listing
>toggledownfall
toggledownfall
11:55:55 [INFO] CONSOLE: Toggling downfall on for world 'world'
```

to this:
```
> whitelist off
whitelist off
11:55:52 [INFO] CONSOLE: Turned off white-listing
> toggledownfall
toggledownfall
11:55:55 [INFO] CONSOLE: Toggling downfall on for world 'world'
```

Also first actual PR, and fittingly so for something so trivial.