[PATCH] help: fix search with `-k` option in non-ASCII locales

[Josh Soref]

>  Hm-m-m... Why? If `entry[0]` has no '__doc__', then `gettext` (imported
> as _) returns None, and non-string `docs` would break code below.

I only moved the ). If _(None) returns None then you will get None or
'', which should be ok.

Am I missing something?