Currently, the Output view uses a tree control which does not support word-wrapping.

This is not a common task for 99% of the Git users.

These 3 rows should indicate a pile of files.

This would be hard to implement because one can select files from different repositories. The light-weight variant https://smartgit.userecho.com/communities/1/topics/301- is implemented now.

Please try with a portable bundle (no previous settings).

You can give it a try in 18.1 preview #12063 (Help | Check for Latest Build).