shithub: neatroff

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ref: 31846b170584720ff92cb53cbba3db259059041a
parent: c289ab80f77deaa184086107341f12a8408bd064
author: Ali Gholami Rudi <ali@rudi.ir>
date: Fri Jun 14 18:56:55 EDT 2013

ren: output non-empty but zero-width lines