gh-143754: Modernize Tkinter docs

[serhiy-storchaka]

Use more up to date terminology instead of "master"/"slave" widgets where it is possible.

• Issue: tkinter source and docs use the word 'slave' #143754

---

📚 Documentation preview 📚: https://cpython-previews--143841.org.readthedocs.build/

[serhiy-storchaka]

I used the modern Tk documentation to update the Tkinter documentation.

[terryjreedy]

Suggested change

	width=amount - width of this widget in pixel
	height=amount - height of this widget in pixel
	width=amount - width of this widget in pixels
	height=amount - height of this widget in pixels

[serhiy-storchaka]

There are other occurrences of "in pixel" in other places, so I think it is better to fix them in a separate PR.

[serhiy-storchaka]

And, the Tk documentation says "in screen units", because not only pixels are supported. You can use millimeters or inches, etc.

[terryjreedy]

approved except for pluralizing 'pixel'.

[miss-islington-app]

Thanks @serhiy-storchaka for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14.
🐍🍒⛏🤖

[bedevere-app]

GH-144032 is a backport of this pull request to the 3.14 branch.

[bedevere-app]

GH-144033 is a backport of this pull request to the 3.13 branch.

[vstinner]

Nice change, thanks.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Debian root 3.13 (tier-1) has failed when building commit 48a8cd1.

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/1441/builds/1736) and take a look at the build logs.
4. Check if the failure is related to this commit (48a8cd1) 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/1441/builds/1736

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/test/support/__init__.py", line 856, in gc_collect
    gc.collect()
ResourceWarning: unclosed file <_io.FileIO name=11 mode='wb' closefd=True>


Traceback (most recent call last):
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/test/support/__init__.py", line 856, in gc_collect
    gc.collect()
ResourceWarning: unclosed file <_io.FileIO name=13 mode='wb' closefd=True>

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot ARM64 MacOS M1 Refleaks NoGIL 3.13 (tier-2) has failed when building commit 48a8cd1.

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/1396/builds/1968) and take a look at the build logs.
4. Check if the failure is related to this commit (48a8cd1) 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/1396/builds/1968

Failed tests:

• test.test_multiprocessing_spawn.test_processes
• test.test_multiprocessing_forkserver.test_processes

Failed subtests:

• test_repr_rlock - test.test_multiprocessing_spawn.test_processes.WithProcessesTestLock.test_repr_rlock
• test_repr_rlock - test.test_multiprocessing_forkserver.test_processes.WithProcessesTestLock.test_repr_rlock

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.itamaro-macos-arm64-aws.macos-with-brew.refleak.nogil/build/Lib/test/_test_multiprocessing.py", line 1493, in test_repr_rlock
    self.assertEqual('<RLock(SomeOtherThread, nonzero)>', repr(lock))
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: '<RLock(SomeOtherThread, nonzero)>' != '<RLock(None, 0)>'
- <RLock(SomeOtherThread, nonzero)>
+ <RLock(None, 0)>