Patdiff is an OCaml implementation of Bram Cohen's patience diff algorithm,
with a few extra conveniences for comparing code and config files:

outputs plain ASCII, ANSI color codes, or HTML

optional semantic diffing of numbers

good word-level diffing out of the box

And of course all the usual features:

• recursive diffing of directories

• extensively configurable output (markers, colors, location format, context)

• whitespace-aware diffing