DOC: better doc on _combine

Author: CindeeM

brainx/weighted_modularity.py

@@ -376,10 +376,10 @@ def _combine(prev, next):
 
     Examples
     --------
-    >>> prev = [set([0,1,2]), set([3,4])]
-    >>> next = [set([0,1])]
+    >>> prev = [set([0,1,2]), set([3,4]), set([5,6])]
+    >>> next = [set([0,1]), set([2])]
     >>> result = _combine(prev, next)
-    [set([0, 1, 2, 3, 4])]
+    [set([0, 1, 2, 3, 4]), set([5,6])]
     """
     expected_len = np.max([x for sublist in next for x in sublist])
     if not len(prev) == expected_len + 1: