Reflect dimension in approx repr for numpy arrays.

src/_pytest/python_api.py

@@ -82,14 +82,18 @@ class ApproxNumpy(ApproxBase):
     """
 
     def __repr__(self):
-        # It might be nice to rewrite this function to account for the
-        # shape of the array...
         import numpy as np
 
-        list_scalars = []
-        for x in np.ndindex(self.expected.shape):
-            list_scalars.append(self._approx_scalar(np.asscalar(self.expected[x])))
+        def recursive_map(f, x):
+            if isinstance(x, list):
+                return list(recursive_map(f, xi) for xi in x)
+            else:
+                return f(x)
 
+        list_scalars = recursive_map(
+                self._approx_scalar,
+                self.expected.tolist())
+                
         return "approx({!r})".format(list_scalars)
 
     if sys.version_info[0] == 2: