Issue #26100:

* Add subprocess._optim_args_from_interpreter_flags()
* Add test.support.optim_args_from_interpreter_flags()
* Use new functions in distutils, test_cmd_line_script, test_compileall and
  test_inspect

The change enables test_details() test of test_inspect when -O or -OO command
line option is used.

Issue #26101: Exclude Lib/test/ from sys.path in test_compilepath(). The
directory contains invalid Python files like Lib/test/badsyntax_pep3120.py,
whereas the test ensures that all files can be compiled.

Issue26017 - Suggest enclosing command args in double quotes when using characters which get interpreted by shell.

Issue26017 - Suggest enclosing command args in double quotes when using characters which get interpreted by shell.

Re-encode CREDITS.txt to utf-8 and open it with 'utf-8'.

Issue26135 - In the tutorial section on modules, reference importlib.reload instead of imp.reload.

Patch by Joel Taddei and Jacek Kołodziej.

Patch by Joel Taddei and Jacek Kołodziej.

Issue26035 - Correct the argument names used in the docs of the traceback module. Make it consistent with module args.

Patch contributed by Upendra Kumar.

 Issue26035 - Correct the argument names used in the docs of the traceback module. Make it consistent with module args.

 Patch contributed by Upendra Kumar.

Otherwise, GDB seems to affect the terminal's foreground process group,
interfering with test_ioctl, which does not expect the foreground process to
change during the test. This change also solves the problem of the tests
being stopped in the shell if test_gdb is run twice in parallel.

"certificate verify failed " and "CERTIFICATE_VERIFY_FAILED " as
some SSL libraries use different text than OpenSSL.

"certificate verify failed " and "CERTIFICATE_VERIFY_FAILED " as
some SSL libraries use different text than OpenSSL.

"certificate verify failed " and "CERTIFICATE_VERIFY_FAILED " as
some SSL libraries use different text than OpenSSL.