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From c99f320d5c0fd98fe88d9cea5407eb7ad9d50e8a Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Mon, 4 Apr 2022 23:52:49 -0700
Subject: zgrep: port to POSIX sed
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* zgrep.in (res): When escaping the file name do not rely on GNU
sed’s extension to POSIX with respect to s/.../\n/. Instead, use
features that should also work with AIX and/or Solaris sed. This is
simpler anyway, and would have prevented the recently-fixed bug.