Typo in doc and a fix for TestProgram being constructed without an explicit testRunner argument.

doc/for-test-authors.rst

@@ -432,7 +432,7 @@ example::
   def test_keys_equal(self):
       x = {'a': 1, 'b': 2}
       y = {'a': 2, 'b': 3}
-      self.assertThat(a, KeysEqual(b))
+      self.assertThat(x, KeysEqual(y))
 
 
 MatchesRegex

testtools/run.py

@@ -307,7 +307,7 @@ class TestProgram(object):
             and getattr(unittest, 'installHandler', None) is not None):
             unittest.installHandler()
         if self.testRunner is None:
-            self.testRunner = runner.TextTestRunner
+            self.testRunner = TestToolsTestRunner(sys.stdout)
         if isinstance(self.testRunner, classtypes()):
             try:
                 testRunner = self.testRunner(verbosity=self.verbosity,