My function randBinStr produces a random string of 0s and 1s of given length.
julia> typeof( randBinStr(5) )
ASCIIString (constructor with 1 method)
julia> test = [ randBinStr(5) for i=1:2 ]
2-element Array{Union(ASCIIString,UTF8String),1}:
"01110"
"00011"
julia> map( typeof, test )
2-element Array{DataType,1}:
ASCIIString
ASCIIString
Why does comprehension introduce the UTF*String into the type?
