commit-reach: terminate merge-base walk when one side is exhausted - #2149

commit-reach: terminate merge-base walk when one side is exhausted#2149

spkrka wants to merge 10 commits into

gitgitgadget:mastergitgitgadget/git:masterfrom

spkrka:side-exhaust-prspkrka/gitgitgadget-git:side-exhaust-prCopy head branch name to clipboard