humanize.apnumber(0) should return zero

[itemir]

humanize.appnumber returns 0 for 0, while (I think) it should return 'zero':

>>> import humanize
>>> humanize.apnumber(0)
'0'
>>> humanize.apnumber(1)
'one'
>>> humanize.apnumber(2)
'two'
>>>

[itemir]

I just saw the following note in the code:

For numbers 1-9, returns the number spelled out. Otherwise, returns the number. This follows Associated Press style. This always returns a string unless the value was not int-able, unlike the Django filter.

I don't know why AP omitted zero but I think it makes sense to spell it out. That being said, feel free to close this if you think otherwise.

[hugovk]

Looking this up, apparently the Associated Press Stylebook (p. 203) says:

• Spell out whole numbers up to (and including) nine (e.g., zero, one, 10, 96, 104).

https://apvschicago.com/2011/05/numbers-spell-out-or-use-numerals.html

Please see PR #121 to fix this.

Thanks for the report!