diffstat(1) on Linux
The text de3acc9f1693, as Debian 7 (Wheezy) shipped it.
make histogram from diff-output
Flags it lists
-
-C -
-R -
-V -
-b -
-c -
-h -
-k -
-l -
-m -
-q -
-r -
-s -
-t -
-u -
-v