Parse error in data file with anonymous enumerated types #776

Hi,

In the MiniZinc tutorial (specifically at Section 2.2.5 on complex constraints), Listing 2.2.10 for jobshop.mzn the model for job-shop scheduling, comes with a data file jdata.dzn, given in Listing 2.2.11, that contains anonymous enumerated types, specifically in the lines

JOB = _(1..5);
TASK = _(1..5);

However, running the command

minizinc --solver gecode --intermediate jobshop.mzn jdata.dzn

gives the error

MiniZinc: syntax error: syntax error, unexpected '(', expecting end of file

I don't know if this is a case of the documentation not lining up with the current program or an accidental regression, but I am filing this since I suspect it to be the latter.