page-break-permission = ##f doesn't work for the final manual \pageBreak

[Paul Morris]

When using

  \override NonMusicalPaperColumn.page-break-permission = ##f 

if the music doesn't easily fit on the last page (i.e. it needs to be 
vertically compressed to fit), then the final manual \pageBreak is ignored and 
an automatic page break occurs that causes the music to spill over onto an 
additional page.  See the three examples below.

The docs say: "When page-break-permission is overridden to false, Lily will 
insert page breaks at explicit \pageBreak commands and nowhere else."  
http://lilypond.org/doc/v2.18/Documentation/notation/explicit-breaks
 
-Paul


%% EXAMPLE 1
\version "2.18.0"

\layout {
  \override NonMusicalPaperColumn.page-break-permission = ##f
}

music = \relative f' {
  e1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c f
}

\score { \music }
\score { \music }
\score { \music }
\score { \music }
\pageBreak

\score { \music }
\score { \music }
\score { \music }
\score { \music }
\pageBreak



%% EXAMPLE 2
\version "2.18.0"

\layout {
  \override NonMusicalPaperColumn.page-break-permission = ##f
}

music = \relative f' {
  e1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c c
  c1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c c
  c1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c c
  c1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c f
}

\score { \music }
\pageBreak
\score { \music }
\pageBreak



%% EXAMPLE 3
\version "2.18.0"

\layout {
  \override NonMusicalPaperColumn.page-break-permission = ##f
}

music = \relative f' {
  e1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c c
  c1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c c
  c1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c c
  c1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c f
  \pageBreak
  e1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c c
  c1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c c
  c1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c c
  c1 c c c c c c c c c c c c c c c c c c c c c
  c c c c c c c c c c c c c c c c c c c c c c f
  \pageBreak
}

\score { \music }