pdiff(1) on Linux
The text 2a19b8546a23, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
produce a pretty comparison between files
Flags it lists
-
--help -
--lines -
--output -
--quiet -
--version -
--words -
-h -
-l -
-o -
-q -
-v -
-w