Current situation:
When viewing a merge commit in Stash it is possible to selcet the commit out of the parent commits relative to which the diff is shown.

Proposal:
When using the "git show" command with a merge commit a combined diff is shown. That means that only the changes that were made during the merge are shown. It would be great if such a diff could be shown in stash aswell. This would make the review of merge commits a lot easier.