gh-105194: Fix format specifier escaped characters in f-strings

[pablogsal]

• Issue: Backslash in f-string format specifier gets escape #105194

[lysnikolaou]

LGTM! Always so fast! 🔫

[miss-islington]

Thanks @pablogsal for the PR 🌮🎉.. I'm working now to backport this PR to: 3.12.
🐍🍒⛏🤖

[bedevere-bot]

GH-105234 is a backport of this pull request to the 3.12 branch.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot ARM Raspbian 3.x has failed when building commit 41de543.

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/all/#builders/424/builds/4135) and take a look at the build logs.
4. Check if the failure is related to this commit (41de543) 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/all/#builders/424/builds/4135

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

== Tests result: ENV CHANGED ==

427 tests OK.

10 slowest tests:

• test_compileall: 10 min 33 sec
• test_venv: 9 min 57 sec
• test_largefile: 9 min
• test_multiprocessing_spawn: 4 min 27 sec
• test_math: 4 min 24 sec
• test_concurrent_futures: 3 min 1 sec
• test_hashlib: 2 min 34 sec
• test_regrtest: 2 min 25 sec
• test_multiprocessing_forkserver: 1 min 54 sec
• test_peg_generator: 1 min 53 sec

1 test altered the execution environment:
test.test_asyncio.test_unix_events

19 tests skipped:
test.test_asyncio.test_windows_events
test.test_asyncio.test_windows_utils test_devpoll test_idle
test_ioctl test_kqueue test_launcher test_perf_profiler
test_startfile test_tcl test_tkinter test_ttk test_ttk_textonly
test_turtle test_winconsoleio test_winreg test_winsound test_wmi
test_zipfile64

Total duration: 38 min 42 sec

Click to see traceback logs

remote: Enumerating objects: 16, done.        
remote: Counting objects:   6% (1/16)        
remote: Counting objects:  12% (2/16)        
remote: Counting objects:  18% (3/16)        
remote: Counting objects:  25% (4/16)        
remote: Counting objects:  31% (5/16)        
remote: Counting objects:  37% (6/16)        
remote: Counting objects:  43% (7/16)        
remote: Counting objects:  50% (8/16)        
remote: Counting objects:  56% (9/16)        
remote: Counting objects:  62% (10/16)        
remote: Counting objects:  68% (11/16)        
remote: Counting objects:  75% (12/16)        
remote: Counting objects:  81% (13/16)        
remote: Counting objects:  87% (14/16)        
remote: Counting objects:  93% (15/16)        
remote: Counting objects: 100% (16/16)        
remote: Counting objects: 100% (16/16), done.        
remote: Compressing objects:   7% (1/13)        
remote: Compressing objects:  15% (2/13)        
remote: Compressing objects:  23% (3/13)        
remote: Compressing objects:  30% (4/13)        
remote: Compressing objects:  38% (5/13)        
remote: Compressing objects:  46% (6/13)        
remote: Compressing objects:  53% (7/13)        
remote: Compressing objects:  61% (8/13)        
remote: Compressing objects:  69% (9/13)        
remote: Compressing objects:  76% (10/13)        
remote: Compressing objects:  84% (11/13)        
remote: Compressing objects:  92% (12/13)        
remote: Compressing objects: 100% (13/13)        
remote: Compressing objects: 100% (13/13), done.        
remote: Total 16 (delta 3), reused 9 (delta 3), pack-reused 0        
From https://github.com/python/cpython
 * branch                  main       -> FETCH_HEAD
Note: switching to '41de54378d54f7ffc38f07db4219e80f48c4249e'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at 41de54378d gh-105194: Fix format specifier escaped characters in f-strings (#105231)
Switched to and reset branch 'main'

./Modules/_testcapi/heaptype_relative.c: In function ‘make_sized_heaptypes’:
./Modules/_testcapi/heaptype_relative.c:62:28: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
   62 |                            (unsigned long long)data_ptr,
      |                            ^

make: *** [Makefile:2002: buildbottest] Error 3