The behavior of Numo::Bit#to_string is not consistent.

[kojix2]

Hello.

I found some strange behavior of Numo::Bit.
Is this some kind of bug?

Step to reproduce

Create a Numo::Bit object.

b = Numo::Bit.ones(1,2)

Call to_string. The results are inconsistent.
If you run irb again, you will get a different result.

b.to_string

# "W" or
# "#" or
# "\x87" ... etc

[kojix2]

I understood it somehow.
Maybe this is not a bug.
We need at least 8 bits to call to_string.