git-difftool(1) on Linux
The text da4507fe7d45, as Debian 8 (Jessie) shipped it.
Show changes using common diff tools
Flags it lists
-
--dir-diff -
--extcmd -
--gui -
--no-prompt -
--prompt -
--tool -
--tool-help -
-d -
-g -
-t -
-x -
-y