cdiff(1)

NAME
     cdiff - context diff

SYNOPSIS
     cdiff [-cn] oldfile newfile

OPTIONS

     -c   Provide n lines of context

EXAMPLES

     cdiff old new >f    # Write context diff on f

     cdiff -c1 old new >f
                         # Use only 1 line of context

DESCRIPTION

     Cdiff produces a context diff by  first  running  diff  and  then  adding
     context.  Some  update  programs,  like  patch,  can use context diffs to
     update files, even in the presence of other, independent changes.

SEE ALSO
     cmp(1), diff(1), patch(1).