-c::
- This flag changes the way a merge commit is displayed. It shows
- the differences from each of the parents to the merge result
+ With this option, diff output for a merge commit
+ shows the differences from each of the parents to the merge result
simultaneously instead of showing pairwise diff between a parent
and the result one at a time. Furthermore, it lists only files
which were modified from all parents.
the parents have only two variants and the merge result picks
one of them without modification.
+-m::
+
+ This flag makes the merge commits show the full diff like
+ regular commits; for each merge parent, a separate log entry
+ and diff is generated. An exception is that only diff against
+ the first parent is shown when '--first-parent' option is given;
+ in that case, the output represents the changes the merge
+ brought _into_ the then-current branch.
+
-r::
Show recursive diffs.