@ Tests for stave joining things.

bracket 3-4 
brace 1-2
breakbarlines 2

[stave 1 treble 1] 
G+ | G+ |
[endstave]

[stave 2 bass 0] 
G+ | G+ |
[endstave]

[stave 3 treble 1] 
G+ | G+ |
[endstave]

[stave 4 bass 0] 
G+ | G+ |
[endstave]

[stave 5 treble 1] 
G+ | G+ |
[endstave]

[stave 6 bass 0] 
G+ | G+ |
[endstave]
