slur/downbow collision

[Graham Percival]

I might have reported this already (if so, sorry); in that case, treat 
this
as merely a confirmation that the problem still exists in 2.3.19.  :)


%% downbow touches slur, 2.3.19
\bookpaper{raggedright=##t}
{
        r2 r4 c''8(\downbow d'')

}