FIX get rid of some doctest errors (with the stricter nosetester)

Author: amueller

sklearn/cross_validation.py

@@ -869,7 +869,7 @@ class StratifiedShuffleSplit(object):
 
     Examples
     --------
-    >>> from sklearn import cross_validation
+    >>> from sklearn.cross_validation import StratifiedShuffleSplit
     >>> X = np.array([[1, 2], [3, 4], [1, 2], [3, 4]])
     >>> y = np.array([0, 0, 1, 1])
     >>> sss = StratifiedShuffleSplit(y, 3, test_size=0.5, random_state=0)

sklearn/semi_supervised/label_propagation.py

@@ -30,6 +30,7 @@
 Example
 -------
 >>> from sklearn import datasets
+>>> from sklearn.semi_supervised import LabelPropagation
 >>> label_prop_model = LabelPropagation()
 >>> iris = datasets.load_iris()
 >>> random_unlabeled_points = np.where(np.random.random_integers(0, 1,
@@ -276,6 +277,7 @@ class LabelPropagation(BaseLabelPropagation):
     Examples
     --------
     >>> from sklearn import datasets
+    >>> from sklearn.semi_supervised import LabelPropagation
     >>> label_prop_model = LabelPropagation()
     >>> iris = datasets.load_iris()
     >>> random_unlabeled_points = np.where(np.random.random_integers(0, 1,
@@ -340,6 +342,7 @@ class LabelSpreading(BaseLabelPropagation):
     Examples
     --------
     >>> from sklearn import datasets
+    >>> from sklearn.semi_supervised import LabelSpreading
     >>> label_prop_model = LabelSpreading()
     >>> iris = datasets.load_iris()
     >>> random_unlabeled_points = np.where(np.random.random_integers(0, 1,