bpo-41731: Make test_cmd_line_script pass with -vv (GH-22206)

Argument script_exec_args is usually an absolute file name,
but twice has form ['-m', 'module_name'].

Lib/test/test_cmd_line_script.py

@@ -145,7 +145,7 @@ class CmdLineTest(unittest.TestCase):
             *run_args, __isolated=False, __cwd=cwd, **env_vars
         )
         if verbose > 1:
-            print('Output from test script %r:' % script_exec_args)
+            print(f'Output from test script {script_exec_args!r:}')
             print(repr(err))
             print('Expected output: %r' % expected_msg)
         self.assertIn(expected_msg.encode('utf-8'), err)

Misc/NEWS.d/next/Tests/2020-09-11-19-12-31.bpo-41731.Ivxh4U.rst

@@ -0,0 +1 @@
+Make test_cmd_line_script pass with option '-vv'.