The same as `--merge` option above, but changes the way the
conflicting hunks are presented, overriding the
`merge.conflictStyle` configuration variable. Possible values
- are "merge" (default) and "diff3" (in addition to what is
- shown by "merge" style, shows the original contents).
+ are "merge" (default), "diff3", and "zdiff3".
--ignore-unmerged::
When restoring files on the working tree from the index, do