Help with the content rating strings in GNOME Software

[Richard Hughes <hughsient gmail com>]

Hi all,

A few people have asked me to "fix" various source strings in
https://git.gnome.org/browse/gnome-software/tree/src/gs-content-rating.c#n70
-- i.e. the content rating descriptions for OARS. Rather than playing
whack-a-mole with the strings, I wondered if anyone with a grasp of
English prose better than mine could review/fix them all?

I'm happy to explain any of them that are confusing. Thanks.

Richard