Update old paper size (c9 => a8landscape)

diff --git a/input/regression/lilypond-book/papersize-docs.tely b/input/regression/lilypond-book/papersize-docs.tely
index d274ac02011c263dda4ecf05d2fa580c160f8108..e47e57fb259d98592adabbe8c7a82c98f4388192 100644 (file)
--- a/input/regression/lilypond-book/papersize-docs.tely
+++ b/input/regression/lilypond-book/papersize-docs.tely
@@ -11,7 +11,7 @@
 This is a sample of a small papersize, which is useful when you
 want to add a @code{\book@{@}} around some input.
 
-@lilypond[verbatim,papersize=c9landscape]
+@lilypond[verbatim,papersize=a8landscape]
 \book {
   \header {
     title = "A scale in LilyPond"