Fix `E251` false positive inside f-strings #19958

Job	Run time
cargo clippy	3m 14s
cargo fmt	17s
cargo fuzz	5m 48s
benchmarks	13m 21s
cargo test \| ubuntu-latest	8m 39s
cargo test \| windows-latest	8m 9s
cargo test (wasm)	2m 21s
cargo udeps	3m 6s
Determine changes	9s
mkdocs	2m 25s
pre-commit	1m 52s
python package	2m 0s
test scripts	1m 1s
Formatter ecosystem and progress checks	0s
ecosystem	5m 49s
	58m 11s

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