> I’d like for the bracket to extend to the end of the bar. [...]
If you use `<< { } // { } >>`, the voices are using names '0', '1',
etc. However, if you use `<< { } \new Voice { } >>`, the name of the
first voice in `<<>>` doesn't change. This might lead to the
following solution.
```
\version "2.24.3"
\layout {
\context {
\Voice
\consists Horizontal_bracket_engraver
}
}
\relative c'' {
a8 a b\startGroup b
<< { \stemUp c4 d\stopGroup }
\new Voice { \stemDown a2 } >>
}
```
Werner
