Fix logsumexp test

Author: edschofield

scipy_maxentropy/__init__.py

@@ -1,4 +1,5 @@
 from __future__ import absolute_import
 from .info import __doc__
 from .maxentropy import *
+# For backward compatibility with scipy.maxentropy:
 from scipy.special import logsumexp

tests/test_maxentropy.py

@@ -8,7 +8,7 @@
 from scipy_maxentropy import logsumexp
 
 
-def test_logsumexp(self):
+def test_logsumexp():
     """Test whether logsumexp() function correctly handles large
     inputs.
     """