git: ching.6: Mention mandoc(1) together with nroff(1)

[Aaron LI]

commit d99c2c2f9395ecc65f9b38063211923263960299
Author: Aaron LI <aly at aaronly.me>
Date:   Sat Feb 20 14:51:09 2021 +0800

    ching.6: Mention mandoc(1) together with nroff(1)

Summary of changes:
 games/ching/ching/ching.6 | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/d99c2c2f9395ecc65f9b38063211923263960299


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