ds/generation-numbers (was Re: What's cooking in git.git (Jun 2018, #01; Fri, 1))

>
> * ds/commit-graph-lockfile-fix (2018-05-22) 1 commit
>    (merged to 'next' on 2018-05-24 at 3d12a02b0c)
>   + commit-graph: fix UX issue when .lock file exists
>   (this branch is used by ds/commit-graph-fsck; uses ds/generation-numbers.)
>
>   Update to ds/generation-numbers topic.
>
>   Wait for ds/generation-numbers
>
>
> * ds/generation-numbers (2018-05-22) 11 commits
>    (merged to 'next' on 2018-05-24 at 56fc38a1b6)
>   + commit-graph.txt: update design document
>   + merge: check config before loading commits
>   + commit: use generation number in remove_redundant()
>   + commit: add short-circuit to paint_down_to_common()
>   + commit: use generation numbers for in_merge_bases()
>   + ref-filter: use generation number for --contains
>   + commit-graph: always load commit-graph information
>   + commit: use generations in paint_down_to_common()
>   + commit-graph: compute generation numbers
>   + commit: add generation number to struct commit
>   + ref-filter: fix outdated comment on in_commit_list
>   (this branch is used by ds/commit-graph-fsck and ds/commit-graph-lockfile-fix.)
>
>   A recently added "commit-graph" datafile has learned to store
>   pre-computed generation numbers to speed up the decisions to stop
>   history traversal.
>
>   Will cook in 'next'.