Pierre-Yves David <pierre-yves.david@logilab.fr> [Tue, 11 Oct 2011 18:16:06 +0200] rev 7937
[facets] FacetFilterMixIn: add documention for class and generate_form
There is also a small refactoring to make the code clearer. An intermediate
variable is introduced and the call is reindented to make it clearer. No logic
change.