[PATCH] lib: return "" rather than NULL from notmuch_thread_get_authors

[David Bremner]

Tomi Ollila <tomi.ollila at iki.fi> writes:

> On Thu, Dec 14 2017, David Bremner wrote:
>
>> The current beheviour is at best underdocumented. The modified test in
>
> Typo in commit message ;), otherwise looks reasonable to me
>

spill chucked and pished,

d