Fix unnecessary space around power op in overlong f-string expressions #36079

Job	Run time
Determine changes	10s
cargo fmt	21s
pre-commit	34s
mkdocs	2m 37s
python package	1m 19s
benchmarks	5m 5s
cargo build (msrv)	4m 3s
cargo clippy	1m 50s
cargo build (release)	0s
cargo shear	25s
cargo test (linux)	1m 46s
cargo fuzz build	0s
cargo test (wasm)	1m 31s
cargo test (windows)	4m 46s
test scripts	1m 0s
formatter instabilities and black similarity	3m 17s
test ruff-lsp	45s
ecosystem	1m 43s
fuzz parser	0s
	31m 12s

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