This file is indexed.

postinst is in ed 1.10-2.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh

set -e

case "$1" in
       configure|abort-upgrade|abort-remove|abort-deconfigure)
	       update-alternatives --quiet --install /usr/bin/editor editor /bin/ed -100 \
		  --slave /usr/share/man/man1/editor.1.gz editor.1.gz /usr/share/man/man1/ed.1.gz
               ;;
esac