Nonsensical column added to data output on early termination

[m-macaskill]

In a Builder experiment with nested loops, terminating the experiment early via the escape key results in a nonsensical column being inserted into the .csv data output file.
e.g. if the outer loop is named trials_2, then following early termination, a column will be added after the trials_2.thisIndex column, labelled trials_2.thisTrial, with cell values of None. i.e. it seems that the entire thisTrial object is being passed to be saved in the data in this situation. This makes data files following early termination have one extra column than data files from regular sessions.

[jeremygray]

._getLoopInfo() has a couple lines that appear to be responsible. If I comment them out I don't see the odd columns when ending early via escape.

            else:
                names.append(name + '.thisTrial')
                vals.append(trial)

At first glance, the data output seems normal when NOT using escape. Important to test more carefully (!).

[peircej]

I don't recall the point of that code. Maybe it's a pure unnecessary piece!