* jn/update-contrib-example-merge: (24 commits)
merge script: learn --[no-]rerere-autoupdate
merge script: notice @{-1} shorthand
merge script: handle --no-ff --no-commit correctly
merge script: --ff-only to disallow true merge
merge script: handle many-way octopus
merge script: handle -m --log correctly
merge script: forbid merge -s index
merge script: allow custom strategies
merge script: merge -X<option>
merge script: improve log message subject
merge script: refuse to merge during merge
merge script: tweak unmerged files message to match builtin
merge script: --squash, --ff from unborn branch are errors
fmt-merge-msg -m to override merge title
merge-base --independent to print reduced parent list in a merge
merge-base --octopus to mimic show-branch --merge-base
Documentation: add a SEE ALSO section for merge-base
t6200 (fmt-merge-msg): style nitpicks
t6010 (merge-base): modernize style
t7600 (merge): test merge from branch yet to be born
...
These are original scripted implementations, kept primarily for their reference value to any aspiring plumbing users who want to learn how pieces can be fit together.