Re: [PATCH v2] diff: document -U without <n> as using default context

>>Since we are retaining this fallback behavior for backward compatibility,
>>update the documentation to explicitly state that '<n>' can be omitted
>>for the short option '-U'.
>>
> i'd replace that with:
>
> Hence we retain this fallback behavior for backward compatibility, but 
> document it as such.
>
>>+	(`-U` without `<n>` is accepted as a silent synonym for `-p` due
>>+	to a historical accident).
>> 
> "silently accepted as a synonym" would be much more natural.