fix: make deeply-nested-body test platform-independent (fixes #3146) #3585

Job	Run time
checks / docs	1m 3s
checks / readme-snippets	12s
checks / pre-commit	59s
checks / test (3.13, lowest-direct, windows-latest)	1m 34s
checks / test (3.10, locked, ubuntu-latest)	1m 26s
checks / test (3.10, locked, windows-latest)	1m 51s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 20s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 9s
checks / test (3.12, locked, windows-latest)	1m 39s
checks / test (3.11, locked, ubuntu-latest)	1m 23s
checks / test (3.12, lowest-direct, windows-latest)	2m 28s
checks / test (3.11, locked, windows-latest)	1m 56s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 22s
checks / test (3.13, locked, windows-latest)	1m 51s
checks / test (3.12, locked, ubuntu-latest)	1m 37s
checks / test (3.14, locked, ubuntu-latest)	1m 20s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 16s
checks / test (3.13, locked, ubuntu-latest)	1m 18s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 23s
checks / test (3.11, lowest-direct, windows-latest)	1m 48s
checks / test (3.14, lowest-direct, windows-latest)	2m 2s
checks / test (3.10, lowest-direct, windows-latest)	1m 35s
checks / test (3.14, locked, windows-latest)	1m 47s
all-green	3s
	34m 22s

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