\version "2.9.8"

\header{
    texidoc="The optimal breaker will put a page turn after
a rest unless there is a 'special' barline within the rest.
"
}

\paper {
  #(define page-breaking ly:optimal-breaking)
  paper-height = #70
}

\relative c' {
  a b c d a b c d \break
  c d e f c d e f R1*4
  \repeat unfold 15 {d4 e f g} \break
  c d e f c d e f R1*2 \bar "||" R1*2
  \repeat unfold 15 {d4 e f g}
}