DataSink docstring incorrect

[mwaskom]

I'm pretty sure, anyway. The Datasink docstring says to use e.g. contrasts@con to stick you contrast images in a contrasts directory. But when I use that, I get a contrasts@con directory with my contrast images in it. Doing contrasts.@con, on the other hand, gives me the behavior I expect. This is also what's done in the tutorials. So either I'm totally confused, or that docstring is wrong.