This library implements 'i;unicode-casemap', the simple, non locale-sensitive
unicode collation algorithm described in RFC 5051
(<http://www.rfc-editor.org/rfc/rfc5051.txt>). Proper unicode collation can be
done using text-icu, but that is a big dependency that depends on a large C
library, and rfc5051 might be better for some purposes.
Here is a list of strings sorted by the Prelude's 'sort' function: 'Abe Oeb abe
abé oeb Ábe Äbe Ôeb ábe äbe ôeb'.
Here is the same list sorted by 'sortBy compareUnicode':
'Abe abe abé Ábe ábe Äbe äbe Oeb oeb Ôeb