ENH: Remove <BLANKLINE> tags before evaluating (#216)

* ENH: Remove <BLANKLINE> tags before evaluating

Doctest stops collecting output on a blank line: if the expected output includes a blank line, that is indicated with a `<BLANKLINE>` tag.  That tag is not valid python, so it needs to be removed before evaluating output for np.isclose.

reviewed at #216

Author: DWesl

scipy_doctest/impl.py

@@ -356,7 +356,7 @@ def check_output(self, want, got, optionflags):
         # OK then, convert strings to objects
         ns = dict(self.config.check_namespace)
         try:
-            a_want = eval(want, dict(ns))
+            a_want = eval(want.replace("<BLANKLINE>", ""), dict(ns))
             a_got = eval(got, dict(ns))
         except Exception:
             # Maybe we're printing a numpy array? This produces invalid python

scipy_doctest/tests/module_cases.py

@@ -271,6 +271,21 @@ def list_of_tuples_numeric():
     """
 
 
+def rank_3_array_repr():
+    """Check recovery of rank-3 array from doctest-style repr.
+
+    >>> import numpy as np
+    >>> np.arange(24).reshape(2, 3, 4)
+    array([[[ 0,  1,  2,  3],
+            [ 4,  5,  6,  7],
+            [ 8,  9, 10, 11]],
+    <BLANKLINE>
+           [[12, 13, 14, 15],
+            [16, 17, 18, 19],
+            [20, 21, 22, 23]]])
+    """
+
+
 # This is used by test_testmod.py::test_public_object_discovery
 # While in test we only need __all__ to be not empty, let's make it correct, too.
 __all__ = [x for x in vars().keys() if not x.startswith("_")]