Add support for command line arguments that contain space

Currently, arguments that contain spaces are treated as multiple, single word arguments.
Add support to arguments that contain spaces.

Current behaviour:
```
$ alc "args[0]+LF" // "test1 test2" test3
test1
```

Expected behaviour:
```
$ alc "args[0]+LF" // "test1 test2" test3
test1 test2
```