Showing a BitVector in NamedTuple

Related thread:

Counterexample:

julia> NaN === -NaN
false

julia> bitstring(NaN)
"0111111111111000000000000000000000000000000000000000000000000000"

julia> bitstring(-NaN)
"1111111111111000000000000000000000000000000000000000000000000000"