Log Message:
Updated textproc/cwdiff 0.2.7 to 0.4.0
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(from https://github.com/junghans/cwdiff/releases page)

on 13 Nov 2015
v0.4.0
   dropped a2ps and out option, clean up
on 1 Jul 2015
v0.3.1
   cwdiff: fix --diffopts option (fixes #4)
on 16 Mar 2015
v0.3.0
   fixed Makefile
on 14 Mar 2015
v0.2.8
   cwdiff: moved issue tracker to github