scikit-learn/scikit-learn — pull request #3829 by amueller (2014-11-05 21:31:03+00:00)
Title: MRG DOC explain SelectorMixin strategy with multiple classes.

Inspired by [stackoverflow](http://stackoverflow.com/questions/26764249/how-does-threshold-work-for-linearsvc-transform/26764788?noredirect=1#comment42111988_26764788).