add numpy 1.13 legacy print option to test_doc.py

Author: grlee77

pywt/tests/test_doc.py

@@ -5,6 +5,8 @@
 import os
 import unittest
 
+import numpy as np
+np.set_printoptions(legacy='1.13')
 
 pdir = os.path.pardir
 docs_base = os.path.abspath(os.path.join(os.path.dirname(__file__),