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

Keysigchangeatend.ly
Description: Text Data