space_around_operator: use same before/after numbers #26284

Job	Run time
mkdocs	2m 7s
cargo fmt	15s
pre-commit	35s
Determine changes	9s
python package	1m 18s
benchmarks	4m 20s
cargo clippy	1m 49s
cargo test (linux)	3m 46s
cargo fuzz	5m 8s
cargo test (wasm)	1m 9s
cargo test (windows)	8m 18s
cargo udeps	1m 50s
formatter instabilities and black similarity	0s
test scripts	51s
test ruff-lsp	16s
ecosystem	8m 44s
	40m 35s

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