When formatting zero or a negative number as bytes, the original number is returned

[rgravina]

I noticed that when bytes is zero or negative, the original number is returned, instead of a formatted number.

// positive values are OK
numeral(1024).format('0.0b')
"1.0KB"

// zero and negative values return unchanged
numeral(0).format('0.0b')
"0.0"
numeral(-1024).format('0.0b')
"-1024.0"

Since none of the documentation examples show negative bytes, I wonder if this is intentional?

A workaround for negative values is to do this in client code using the library:

// if the value is negative, before displaying....
'-'+numeral(Math.abs(-1024)).format('0.0b')
"-1.0KB"

If the value is zero however, I think some other fix is required.

[therebelrobot]

Can confirm in my own code that numeral(0).format('0b') is being returned without the unit.