fixed db-api documentation on queryset.get() method

[leotr]

According to documentation:

get() raises AssertionError if more than one object was found

According to the Queryset.get():

        if num == 1:
            return clone._result_cache[0]
        if not num:
            raise self.model.DoesNotExist("%s matching query does not exist."
                    % self.model._meta.object_name)
        raise self.model.MultipleObjectsReturned("get() returned more than one %s -- it returned %s! Lookup parameters were %s"

Seems like documentation is wrong.

[leotr]

Actually it's a bug, so i think that it should be checked in without decision of core team

[Russell Keith-Magee]

(In [7559]) Fixed #7260 -- Corrected the description of the exception returned by get() when multiple objects match the search criteria. Thanks, leotr.