Improve stats presentation for calls.

[markshannon]

Another minor improvement to stats. This time for calls.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x RHEL7 LTO 3.x has failed when building commit d4052d8.

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/402/builds/3555) and take a look at the build logs.
4. Check if the failure is related to this commit (d4052d8) 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/402/builds/3555

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

== Tests result: ENV CHANGED ==

408 tests OK.

10 slowest tests:

• test_tools: 3 min 7 sec
• test_concurrent_futures: 2 min 34 sec
• test_multiprocessing_spawn: 2 min 7 sec
• test_tokenize: 1 min 47 sec
• test_multiprocessing_forkserver: 1 min 17 sec
• test_multiprocessing_fork: 1 min 11 sec
• test_asyncio: 1 min 8 sec
• test_unicodedata: 56.9 sec
• test_signal: 48.6 sec
• test_lib2to3: 43.8 sec

1 test altered the execution environment:
test_asyncio

24 tests skipped:
test_check_c_globals test_devpoll test_gdb test_idle test_ioctl
test_kqueue test_launcher test_msilib test_peg_generator
test_perf_profiler test_smtpnet test_ssl test_startfile test_tcl
test_tix test_tkinter test_ttk test_ttk_textonly test_turtle
test_winconsoleio test_winreg test_winsound test_wmi
test_zipfile64

Total duration: 6 min 31 sec

Click to see traceback logs

Note: checking out 'd4052d835bd6f1b648d533dab8c228b6e3944651'.
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 performing another checkout.
If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:
git checkout -b new_branch_name
HEAD is now at d4052d8... Improve stats presentation for calls. (GH-100274)
Switched to and reset branch 'main'
Objects/obmalloc.c:776:1: warning: always_inline function might not be inlinable [-Wattributes]
arena_map_get(pymem_block *p, int create)
^
make: *** [buildbottest] Error 3