scikit-learn/scikit-learn — pull request #1582 by ApproximateIdentity (2013-01-15 19:41:20+00:00)
Title: Changed minus sign to plus.

Sorry this may seem confusing and like like a duplicate, but the other pull requests for the same issue did not correct the parallel.py file because it was external. But now Gael has fixed the documentation in that file on the joblib repository so now it probably makes sense to change the file here for correctness/consistency.