Bend crossing barline

[Dan Eble]

I guess that it is undesirable for these bends to cross the barlines.  If 
someone validates my judgment, I'll create a ticket and try to improve it.
— 
Dan

\version "2.20.0"

quarters = \fixed c'' {
  c4\bendAfter -4
  c4\bendAfter -4
  \repeat volta 2 {
    c2\bendAfter -4
    |
    c2\bendAfter -4
  }
  c4\bendAfter -4
  c4\bendAfter -4
}

sixteenths = \repeat unfold 32 c'16

\new Score \with {
  currentBarNumber = #10000
  barNumberVisibility = #(every-nth-bar-number-visible 1)
  \override BarNumber.break-visibility = #all-visible
} {
  << \quarters \sixteenths >>
}