EHN: handle frozenset in pprint #21784

Job	Run time
Pyodide build	7m 55s
Linux-32-bit	7m 39s
Linux-Musl	7m 42s
python-freethreading	7m 54s
python-dev (macOS-13)	7m 54s
python-dev (macOS-14)	7m 58s
python-dev (ubuntu-22.04)	7m 53s
python-dev (windows-latest)	7m 48s
macos-13 actions-310.yaml	7m 57s
macos-13 actions-311.yaml	7m 53s
macos-13 actions-312.yaml	7m 58s
macos-14 actions-310.yaml	7m 58s
macos-14 actions-311.yaml	7m 58s
macos-14 actions-312.yaml	7m 57s
windows-latest actions-311.yaml	7m 46s
windows-latest actions-312.yaml	7m 48s
windows-latest actions-310.yaml	7m 47s
Minimum Versions	7m 54s
Future infer strings (without pyarrow)	12m 40s
Locale: zh_CN	7m 58s
Locale: it_IT	7m 54s
Downstream Compat	6m 5s
Numpy Dev	7m 56s
Pyarrow Nightly	7m 55s
Future infer strings	12m 34s
Pypy	1m 30s
ubuntu-22.04 actions-310.yaml	12m 38s
ubuntu-22.04 actions-311.yaml	12m 38s
ubuntu-22.04 actions-312.yaml	12m 38s
ubuntu-24.04-arm actions-312.yaml	10m 23s
ubuntu-24.04-arm actions-311.yaml	9m 37s
ubuntu-24.04-arm actions-310.yaml	9m 40s
	4h 33m 45s

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