Fix a stray newline in the cell type docstring

[DanielEScherzer]

The contents documentation was split over multiple lines, but an extra newline meant that there was an (indented) line with just the word "and" followed by an unindented line with "further attempts...". Remove that newline to avoid having just a single word in the documentation and to fix the indentation.

[python-cla-bot]

All commit authors signed the Contributor License Agreement.

[bedevere-app]

Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.

[DanielEScherzer]

Not sure if this needs a test, but tested locally with

def outer_func(x):
    return lambda: print (x)
holds_cell = outer_func(5)
print(holds_cell.__closure__[0].__class__.__doc__)

Seemed trivial enough not to need a GitHub issue or a NEWS entry

[StanFromIreland]

Merged, thank you!

[miss-islington-app]

Thanks @DanielEScherzer for the PR, and @StanFromIreland for merging it 🌮🎉.. I'm working now to backport this PR to: 3.14.
🐍🍒⛏🤖

[miss-islington-app]

Thanks @DanielEScherzer for the PR, and @StanFromIreland for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖

[miss-islington-app]

Thanks @DanielEScherzer for the PR, and @StanFromIreland for merging it 🌮🎉.. I'm working now to backport this PR to: 3.15.
🐍🍒⛏🤖

[bedevere-app]

GH-157276 is a backport of this pull request to the 3.14 branch.

[bedevere-app]

GH-157277 is a backport of this pull request to the 3.13 branch.

[bedevere-app]

GH-157278 is a backport of this pull request to the 3.15 branch.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Arch Linux Asan 3.13 (tierless) has failed when building commit 997d79d.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1464/builds/1255) and take a look at the build logs.
4. Check if the failure is related to this commit (997d79d) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1464/builds/1255

Failed tests:

• test_io

Failed subtests:

• test_daemon_threads_shutdown_stderr_deadlock - test.test_io.CMiscIOTest.test_daemon_threads_shutdown_stderr_deadlock
• test_daemon_threads_shutdown_stdout_deadlock - test.test_io.CMiscIOTest.test_daemon_threads_shutdown_stdout_deadlock

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan/build/Lib/test/test_io.py", line 4821, in test_daemon_threads_shutdown_stderr_deadlock
    self.check_daemon_threads_shutdown_deadlock('stderr')
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan/build/Lib/test/test_io.py", line 4811, in check_daemon_threads_shutdown_deadlock
    self.assertFalse(err.strip('.!'))
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
AssertionError: '=================================================================\n==1147610==ERROR: AddressSanitizer: heap-use-after-free on address 0x7ce84fc52898 at pc 0x55da58514306 bp 0x7bb84d9fe080 sp 0x7bb84d9fe070\nREAD of size 8 at 0x7ce84fc52898 thread T1\n' is not false


Traceback (most recent call last):
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan/build/Lib/test/test_io.py", line 4821, in test_daemon_threads_shutdown_stderr_deadlock
    self.check_daemon_threads_shutdown_deadlock('stderr')
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan/build/Lib/test/test_io.py", line 4811, in check_daemon_threads_shutdown_deadlock
    self.assertFalse(err.strip('.!'))
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
AssertionError: '=================================================================\n==1147741==ERROR: AddressSanitizer: heap-use-after-free on address 0x7c7356052898 at pc 0x560dd2402306 bp 0x7b4353dfe080 sp 0x7b4353dfe070\nREAD of size 8 at 0x7c7356052898 thread T1\n' is not false


Traceback (most recent call last):
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan/build/Lib/test/test_io.py", line 4816, in test_daemon_threads_shutdown_stdout_deadlock
    self.check_daemon_threads_shutdown_deadlock('stdout')
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan/build/Lib/test/test_io.py", line 4811, in check_daemon_threads_shutdown_deadlock
    self.assertFalse(err.strip('.!'))
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
AssertionError: '=================================================================\n==1147615==ERROR: AddressSanitizer: heap-use-after-free on address 0x7d1209a52898 at pc 0x5556b82d3306 bp 0x7be2077fe080 sp 0x7be2077fe070\nREAD of size 8 at 0x7d1209a52898 thread T1\n' is not false