bar-line interface part 2/2: New bar line definition standard

input/regression/lyrics-bar.ly

-\version "2.16.0"
+\version "2.17.5"
 
 \header{
 texidoc="
 Adding a @code{Bar_engraver} to the Lyrics context makes sure that
 lyrics do not collide with barlines.
 "
 }
 
 \layout {
     ragged-right = ##t
 }
 
 \relative c'' <<
     \new Voice = "a"{
-        b1 \bar "|:" b1 \bar ":|" b1 \bar "|."
+        b1 \bar ".|:" b1 \bar ":|." b1 \bar "|."
     }
     \new Lyrics \with {
         \consists "Bar_engraver"
         \consists "Separating_line_group_engraver"
     } \lyricsto "a" {
           bars lengthened if
       }
     \new Lyrics \lyricsto "a" {
         required for noncollision
     }
     \new Staff {
         b1 b1 b1
     }
 >>
 \layout {
   \context {
     \Lyrics
       \override VerticalAxisGroup #'nonstaff-nonstaff-spacing #'minimum-distance = #4.2
       \override LyricText #'Y-offset = #-0.7
       \override BarLine #'bar-extent = #'(-2 . 2)
   }
 }