Consider exactly `_` for wildcard pattern #27008

Job	Run time
mkdocs	53s
cargo fmt	25s
pre-commit	51s
Determine changes	12s
python package	42s
cargo clippy	48s
cargo fuzz	1m 5s
cargo test (linux)	51s
benchmarks	56s
cargo test (wasm)	38s
cargo test (windows)	2m 43s
cargo udeps	47s
formatter instabilities and black similarity	2m 0s
test scripts	29s
ecosystem	0s
test ruff-lsp	0s
	13m 20s

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