Key Signature Change beyond the end of a movement.

[Richard Shann]

When the following movement in a score is going to be in a different
key the player is sometimes warned by printing a key signature change
after the closing barline.
The attached file accomplishes this, but I wonder if there is something
less hacky that does this. In particular the spacer rest duration
matters but what it is doing exactly seems a mystery.

Richard Shann



\version "2.22.0"
\markup {Movement I}
{
  c'' c'' c'' c'' 
  c''  c'' 
 \bar "|." \key bes \major s16  }
\markup {Movement II }
{ \key bes \major
  c''4 c'' c'' c'' 
  c''  c'' \bar "|." }