meld(1) on Linux
The text de96ab0bdd68, as Debian 9 (Stretch) shipped it.
Visual diff and merge tool for the GNOME Desktop
Flags it lists
-
--auto-compare -
--auto-merge -
--comparison-file -
--help -
--label -
--newtab -
--output -
--unified -
--version -
-L -
-a -
-h -
-n -
-o -
-u