[3.10] bpo-31904: Correct error string in test_file_not_exists() for VxWorks (GH-25965) (GH-25983)

The error string on VxWorks is "no such file or directory" for FileNotFoundError. That is, the 1st letter of the error string has lower case.
(cherry picked from commit b063b02)


Co-authored-by: pxinwr <[email protected]>

Automerge-Triggered-By: GH:gpshead

Author: miss-islington

Lib/test/test_py_compile.py

@@ -276,7 +276,7 @@ def test_file_not_exists(self):
         rc, stdout, stderr = self.pycompilecmd_failure(self.source_path, should_not_exists)
         self.assertEqual(rc, 1)
         self.assertEqual(stdout, b'')
-        self.assertIn(b'No such file or directory', stderr)
+        self.assertIn(b'no such file or directory', stderr.lower())
 
     def test_file_not_exists_with_quiet(self):
         should_not_exists = os.path.join(os.path.dirname(__file__), 'should_not_exists.py')

Misc/NEWS.d/next/Tests/2021-05-07-15-46-04.bpo-31904.8dk3la.rst

@@ -0,0 +1 @@
+Ignore error string case in test_py_compile ``test_file_not_exists()``.