build

diff: stricter uncommon lcs, match up leading/trailing ranges instead #12332

Job	Run time
Build jj-lib without Git support	44s
build (ubuntu-latest)	4m 3s
build (macos-14)	3m 13s
build (windows-latest)	7m 11s
cargo-deny (advisories)	23s
Check protos	40s
Clippy check	2m 22s
build (ubuntu-latest, --all-features)	5m 6s
cargo-deny (bans licenses sources)	26s
Check that MkDocs can build the docs	21s
Check that MkDocs can build the docs with Poetry 1.8	24s
Check formatting	16s
	25m 9s

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