S02 mistake re Blob?

[Darren Duncan]

I notice from looking at http://design.perl6.org/S02.html that Blob is listed 
both as being a role and as a type.  See http://design.perl6.org/S02.html#Roles 
for an example of the former, and 
http://design.perl6.org/S02.html#Immutable_types for an example of the latter. 
-- Darren Duncan