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[Groff] Question about .substring

From: Steffen Nurpmeso
Subject: [Groff] Question about .substring
Date: Wed, 19 Nov 2014 17:07:07 +0100
User-agent: s-nail v14.7.8-72-gb9e3dff

Hello: this is a bug?

  $ print ".ds x abc\n.substring x 0 1\n.if '\*x'a' .tm x true for 0 1\n" |
    troff -a
  <beginning of page>
  $ print ".ds x abc\n.substring x 0 0\n.if '\*x'a' .tm x true for 0 0\n" |
    troff -a
  x true for 0 0
  <beginning of page>


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