use assert[Not]In where appropriate
diff --git a/Lib/test/test_inspect.py b/Lib/test/test_inspect.py
index d7e5e38..67d76be 100644
--- a/Lib/test/test_inspect.py
+++ b/Lib/test/test_inspect.py
@@ -474,8 +474,8 @@
self.assertIn(('s', 'static method', A), attrs, 'missing static method')
self.assertIn(('c', 'class method', A), attrs, 'missing class method')
self.assertIn(('p', 'property', A), attrs, 'missing property')
- self.assertTrue(('m', 'method', A) in attrs,
- 'missing plain method: %r' % attrs)
+ self.assertIn(('m', 'method', A), attrs,
+ 'missing plain method: %r' % attrs)
self.assertIn(('m1', 'method', A), attrs, 'missing plain method')
self.assertIn(('datablob', 'data', A), attrs, 'missing data')