RUBY-1133 Make logic clearer in Selectable
RUBY-1133 Make logic clearer in Selectable

saghm/mongo-ruby-driver,kay-kim/mongo-ruby-driver,mongodb/mongo-ruby-driver,mongodb/mongo-ruby-driver,estolfo/mongo-ruby-driver,jonhyman/mongo-ruby-driver,kay-kim/mongo-ruby-driver,estolfo/mongo-ruby-driver,saghm/mongo-ruby-driver,jonhyman/mongo-ruby-driver,mongodb/mongo-ruby-driver