5 " Hara-kiri staves are suppressed if they are empty. This
6 example really contains three rhythmic staves, but as it progresses, empty ones
7 are removed: this example has three staves, but some of them
8 disappear: note how the 2nd line only has the bar number 2. (That the
9 bar number is printed might be considered a bug, however, the scenario
10 of all staves disappearing does not happen in practice.)
12 Any staff brackets and braces are removed, both in the single staff
26 \context StaffGroup
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