On Mon, 15 Oct 2001, Perry E. Metzger wrote:
> Sometimes I wonder whether a tool that actually ignored the whitespace
> in two files entirely and produced a diff that somehow avoided the
> entire issue of differing whitespace would be useful to us.

As Itojun mentioned, there's "diff -b", which ignores horizontal white
space but does not ignore changes in line breaks.

"wdiff" (in pkgsrc) ignores all white space, including line breaks, but
does not ignore changes in comments.

"spiff" (not in NetBSD's pkgsrc, but available from
http://www.darwinsys.com/freeware/) can be configured to ignore
comments, but has an ugly output format.

--apb (Alan Barrett)