Rust

Return brackets in autolinks behavior back to cmark-gfm #687

Job	Run time
build_wasm	48s
no_features_build_test (nightly)	36s
clippy_format (stable)	31s
build_test (nightly)	1m 23s
no_features_build_test (beta)	30s
lockfile	52s
build_test (beta)	1m 11s
no_features_build_test (stable)	33s
build_test (stable)	1m 0s
build_spec (nightly)	1m 19s
build_spec (beta)	1m 1s
build_spec (stable)	57s
	10m 41s

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