gh-92886: Fix test in test_routines.py so that it works when running with optimizations (-O)

[jackh-ncl]

#92886

Before:

$ ./python.exe -Om unittest test.test_coroutines ........................./Users/.../dev/cpython/Lib/test/test_coroutines.py:2207: RuntimeWarning: coroutine 'CoroutineTest.test_bpo_45813_2.<locals>.f' was never awaited with self.assertWarns(RuntimeWarning): RuntimeWarning: Enable tracemalloc to get the object allocation traceback ............................................................F......... ====================================================================== FAIL: test_with_5 (test.test_coroutines.CoroutineTest.test_with_5) ---------------------------------------------------------------------- Traceback (most recent call last): File "/Users/.../dev/cpython/Lib/test/test_coroutines.py", line 1284, in test_with_5 with self.assertRaises(AssertionError): ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ AssertionError: AssertionError not raised ---------------------------------------------------------------------- Ran 95 tests in 0.323s FAILED (failures=1)

After:

$ ./python.exe -Om unittest test.test_coroutines ........................./Users/jackhindmarch/dev/cpython/Lib/test/test_coroutines.py:2207: RuntimeWarning: coroutine 'CoroutineTest.test_bpo_45813_2.<locals>.f' was never awaited with self.assertWarns(RuntimeWarning): RuntimeWarning: Enable tracemalloc to get the object allocation traceback ...................................................................... ---------------------------------------------------------------------- Ran 95 tests in 0.325s OK

[bedevere-bot]

Most changes to Python require a NEWS entry.

Please add it using the blurb_it web app or the blurb command-line tool.

[kumaraditya303]

News entry is not required, you can remove it.

[jackh-ncl]

News entry is not required, you can remove it.

done

[JelleZijlstra]

@iritkatriel made this same change already in #98060.

[iritkatriel]

Sorry, I didn't see this.