fix: random sign when +ve is false(re)

[viraj-s15]

What does this change

When using print(f.pyfloat(positive=False)) , the number could be positive or negative.
Now when positive is false, only negative numbers would be returned.

What was wrong

Both negative and positive being returned.

How this fixes it

Removed randomly picking a sign if positive is false

Fixes: #1928

Now this could be intended, if it was, maintainers, please let me know, I would love to implement the random sign functionality but that would require changing the function arguments and tests.

I did not want to ruin the commit history by making changes to the messed up pr.
Apologies to the maintainers. heres the actual pr.

[fcurella]

I think the correct behavior should be:

positive=True always return a positive number
positive=False always return a negative
positive=None (or not specified at all) return random sign

[viraj-s15]

positive=True always return a positive number positive=False always return a negative positive=None (or not specified at all) return random sign

Agreed, will add that.

[fcurella]

Thank you!