I modified description of setting system variables in dependency on O.S.
Thank you, it's almost OK. As mentioned in my previous mail, I think "determines" should be "determine" to follow other messages. I'll mark this patch as ready for committer when this is fixed.
fixes
+ printf(_(" COMP_KEYWORD_CASE determines which letter case to use when completing an SQL key word\n"));
Personally, I don't think we have to describe how to set environment variables, because it's preliminary knowledge and not specific to PostgreSQL. However, I don't mind if you retain or remove the description.
