UI docs: Rephrase the UI method function return value description
UI docs: Rephrase the UI method function return value description

It seems the =item isn't supposed to have pure numbers, or so tells me
perldoc.

Reviewed-by: Tim Hudson <eb0be8e447f673b41b10eda09d63cd72526b0a42@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2906)
openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl