diffpp - pretty-print diff outputs with GNU enscript
diffpp currentfile < diff-file
Diffpp converts diff(1)-program's output files to a
format suitable to be printed with GNU enscript(1). Program
annotates the changes with enscript's special escapes so enscript can
highlight the modified portions of the file. All changed and added
lines are printed with gray-background, deleted lines are marked with
minus (`-') characters; diffpp prints one minus character for
each deleted line.
The easiest way to use diffpp is to use it as an input filter
for enscript. If an input filter is specified for enscript it is used
to pre-process the incoming data-stream. Filtering does not alter any
header strings or file-timestamps which might be printed on enscript
headers; only the incoming data is modified.