Insert parentheses for multi-argument generators #30834

Job	Run time
pre-commit	36s
Determine changes	9s
mkdocs	2m 34s
cargo fmt	19s
python package	1m 14s
cargo clippy	1m 44s
cargo build (msrv)	2m 56s
benchmarks	5m 1s
cargo build (release)	6m 9s
cargo fuzz	4m 32s
cargo shear	24s
cargo test (linux)	3m 23s
cargo test (wasm)	1m 8s
cargo test (windows)	7m 44s
formatter instabilities and black similarity	0s
test scripts	59s
ecosystem	8m 50s
test ruff-lsp	15s
Fuzz the parser	0s
	47m 57s

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