Confusing behavior enter key in interactive mode

[davidor]

When in the interactive mode, if the user presses the enter key, he will get an error like this:

ERROR: Parse error at line 1, column 1:
nil
^
Expected one of:
singletons (followed by end-of-string)
st (followed by end-of-string)
finalizers (followed by end-of-string)
f (followed by end-of-string)
list (followed by end-of-string)
q (followed by end-of-string)
quit (followed by end-of-string)
exit (followed by end-of-string)
h (followed by end-of-string)
help (followed by end-of-string)
many-costructor-params
mcp
many-constructors
mc
load

Wouldn't it be more intuitive to get something like this when pressing enter multiple times?

If you think so, I can fix this.

[davidor]

This should be fixed in #59