ed: upgrade 1.20.1 -> 1.20.2

Changelog:
=============
- main_loop.c (command_s): Fix g/x/s/x/x, which failed to skip the
  final newline, printing lines twice.

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit d726710f)
Signed-off-by: Steve Sakoman <steve@sakoman.com>