Consider this snippet.
```tex
cancellationFirst =
\override Score.BreakAlignment.break-align-orders =
#(grob-transformer 'break-align-orders
(lambda (grob orig)
(let ((vec (vector-copy orig))
(middle '(key-cancellation
staff-bar
key-signature)))
(vector-set! vec 1 middle)
vec)))
music = { \key ces \major ces'1 \bar "||"
\key cis \major cis'1 }
{ <>^\markup "default"
\music }
{ <>^\markup "cancellationFirst"
\cancellationFirst
\music }
```
As can be seen in the image, flipping the order of the bar line and
the key cancellation changes the horizontal spacing between the
`NoteHead` and `NonMusicalPaperColumn` grobs in a bad way. Why does
this happen, and how can I avoid this?
The third line shows the same without a bar line, where the spacing is
just fine.
Werner
