Minor documentation/comment fixes.

docs/xor_example.rst

@@ -4,7 +4,7 @@ Overview of the basic XOR example (xor2.py)
 
 .. default-role:: any
 
-The xor2.py example, shown in its entirety at the bottom of this page, evolves a network that implements the two-input
+The xor/evolve-feedforward.py example, shown in its entirety at the bottom of this page, evolves a network that implements the two-input
 XOR function:
 
 =======  =======  ======

neat/stagnation.py

@@ -1,4 +1,4 @@
-"""Keeps track of whether species are making progress and helps remove ones that are not."""
+"""Keeps track of whether species are making progress and helps remove those which are not."""
 import sys
 
 from neat.config import ConfigParameter, DefaultClassConfig

tests/test_activation.py

@@ -4,7 +4,7 @@
 from neat import activations
 
 
-# TODO: These tests are just smoke tests to make sure nothing has become badly broken.  Expand
+# TODO: These are just smoke tests to make sure nothing has become badly broken.  Expand
 # to include more detailed tests of actual functionality.
 
 class NotAlmostEqualException(Exception):

tests/test_reproduction.py

@@ -54,4 +54,4 @@ def test_spawn_adjust3(self):
 
 
 if __name__ == '__main__':
-    unittest.main()
+    unittest.main()

tests/test_utils.py

@@ -3,9 +3,6 @@
 import neat
 
 
-# import os
-
-
 # TODO: These tests are just smoke tests to make sure nothing has become badly broken.  Expand
 # to include more detailed tests of actual functionality.