ADD_ACKNOWLEDGER (Volta_engraver, note_column);
ADD_ACKNOWLEDGER (Volta_engraver, bar_line);
ADD_TRANSLATOR (Volta_engraver,
/* doc */ "Make volta brackets.",
/* create */ "VoltaBracket",
ADD_ACKNOWLEDGER (Volta_engraver, note_column);
ADD_ACKNOWLEDGER (Volta_engraver, bar_line);
ADD_TRANSLATOR (Volta_engraver,
/* doc */ "Make volta brackets.",
/* create */ "VoltaBracket",