[PATCH v3] mbstowcs: Document, test, and fix null pointer dst semantics (Bug 25219)

[Carlos O'Donell]

On 6/1/20 1:07 PM, Florian Weimer wrote:
> * Carlos O'Donell:
> 
>> On 6/1/20 12:35 PM, Florian Weimer wrote:
>>> * Carlos O'Donell:
>>>
>>>> How about this?
>>>> ~~~
>>>> This behaviour of accepting a null pointer for @var{wstring} is an @w{XPG4.2}
>>>> extension that is not specified in @w{ISO C} and is optional in @w{POSIX}.
>>>> ~~~
>>>
>>> Looks good to me.
>>  
>> v3
>> - Updated XPG4.2 text.
>> - Fixed space after sizeof x 2
>> - Fixed space after period x 1
>>
>> OK for master?
> 
> Yes please.
> 

Pushed. Thanks!

-- 
Cheers,
Carlos.