key change with repeat bar

[Nigel Holmes]

Hello,

I only recently started using Lilypond and apologize if this is a 
question answered in the documentation (I did look, and also tried 
searching this list's archive).

I need to change key immediately before the end of a repeat (the piece 
changes key in the middle of the repeated section).  Lilypond seems to 
put the key signature after the repeat bar by default.  I found a way to 
change this in the documentation, but that leaves the natural too close 
to the bar (shortened example below).  Is there any way to get it 
further away from the bar line?

Thanks in advance if anyone can help,

Nigel Holmes


Example follows:

\version  "2.8.3"
\header {

}

melody = \relative c' \context Voice = "singer"
{

    \key c\major

    \time 2/4

    \clef treble

   r4 r8

   e8
   \repeat volta 4 { \bar "|:"
       a a d d
       %...
       d,4. e8 \key g\major a a d d
       %...
       a16. b32 a16 g f8 e16 e d4. e8
\once \override Score.BreakAlignment #'break-align-orders = 
#(make-vector  3
               '(span-bar
               breathing-sign
               staff-bar
               key
               clef
               time-signature))
  
    \key c\major \bar ":|"
   }
   r2 r \bar  "||"    

}


\book{
\score{<<
   \new Staff<< \melody  >>
   >>
   \layout{}
      }
}