+\header{
+texidoc="
+Tuplets are indicated by a bracket with a number. There should be no
+bracket if there is one beam that matches the length of the tuplet.
+The bracket does not interfere with the stafflines, and the number is
+centered in the gap in the bracket.
+";
+}
\score{
\notes \context Voice \relative c'' {
\times 2/3 { \times 2/3 { a8 b c} c }