Update Lib/test/test_cmd.py

Co-authored-by: Petr Viktorin <[email protected]>

Author: Constantin1489

Lib/test/test_cmd.py

@@ -286,7 +286,7 @@ def do_tab_completion_test(self, args):
 
         output = run_pty(script, input)
 
-        self.assertIn(b'tab_completion_test', output)
+        self.assertIn(b'ab_completion_test', output)
         self.assertIn(b'tab completion success', output)
 
 def load_tests(loader, tests, pattern):