Whitespace in $NOTMUCH_SRCDIR (and $PWD) may work in builds,
but definitely will not work in tests. It would be difficult
to make tests support whitespace in test filename paths -- and
fragile to maintain if done.
So it is just easier and safer to disallow whitespace there.
In case of out of tree
Tomas Nordin writes:
>
> I wonder if it is due to the w3m package or something else?
>
notmuch does not know anything about w3m, so I'm reasonably sure this is
not a notmuch problem aside from the doc problem I already mentioned: we
should probably say "if you don't use shr, you're on your own",
Andreas Kloeckner writes:
> David Bremner writes:
>
>> Andreas Kloeckner writes:
>>
>>> Thanks for getting back to me! It turns out that your idea with the HTML
>>> viewer (`mm-text-html-renderer`) was spot-on. I had that set to 'w3m',
>>> and reverting it to the default (`shr`) not only render
