LSR Partcombine snippet misleading/contradicts the NR

[James Lowe]

Hello,

I'd like someone else's opinion please?

http://lsr.dsi.unimi.it/LSR/Item?id=704

It states in one line

"\partcombine apparently works with 3 voices -- stem up single, stem down 
single, stem up combined."

yet in the NR it explicitly states that \partcombine only works with 2 voices.

So either this Snippet is wrong or needs more context, or I'm missing something.

James