build

next/prev: fix a few bugs in `--conflict` #11901

Job	Run time
build (ubuntu-latest)	4m 5s
build (macos-14)	3m 5s
Build jj-lib without Git support	43s
build (windows-latest)	8m 32s
Check protos	28s
build (ubuntu-latest, --all-features)	4m 57s
Check that MkDocs can build the docs	25s
Check formatting	18s
cargo-deny (advisories)	24s
Clippy check	2m 26s
Check that MkDocs can build the docs with Poetry 1.8	24s
cargo-deny (bans licenses sources)	25s
	26m 12s

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