Merge pull request #586 from JoelPasvolsky/fix_doctest_fails

Fix broken doctest on ``broken_chains()``

Author: arcondello

dwave/embedding/chain_breaks.py

@@ -46,13 +46,15 @@ def broken_chains(samples, chains):
         broken.
 
     Examples:
+
+        >>> import numpy as np
+        ...
         >>> samples = np.array([[-1, +1, -1, +1], [-1, -1, +1, +1]], dtype=np.int8)
         >>> chains = [[0, 1], [2, 3]]
         >>> dwave.embedding.broken_chains(samples, chains)
         array([[True, True],
                [ False,  False]])
 
-        >>> samples = np.array([[-1, +1, -1, +1], [-1, -1, +1, +1]], dtype=np.int8)
         >>> chains = [[0, 2], [1, 3]]
         >>> dwave.embedding.broken_chains(samples, chains)
         array([[False, False],