let's imagine you're resolving this merge conflict (in screenshot).
You've forgotten which code comes from your current branch and which one comes from the "other" branch. How do you figure it out? Do you:
* remember what the "top" and "bottom" parts correspond to from past merge conflicts?
* remember what `HEAD` means?
* read the last line of the merge conflict?
* run something like `git show main` or `git diff mybranch..main` to see the diff?
* something else?
@b0rk I think I know intuitively what "top" and "bottom" mean (at least in the diff3 format), even though if someone asked me, answering would require more thought. In the process of comparing to the middle revision, I'll think things like "oh, upstream did this" without really thinking about which one is upstream.
@b0rk I think in my intuition HEAD/top is "the thing I'm adding changes to" and bottom is "the changes I'm adding" - the branch I merged in, or the commit I cherry-picked (including in a rebase) or reverted.
