Decide to use the default paragraph indent. A zero indent means that you really then want space between paragraphs. And that in turn means that you get extra spaces between a tune and any Change notification. So for now use the default indentation to signal a paragraph and see how that goes. Possibly the tunes should be generate such that there is no paragraph between the graphic and the change notification, but I'd have to work out how.

X:1
T:Staffordshire Hornpipe, The
M:C
L:1/8
S:Flamborough
K:Gmaj
(3DEF |\
G2e2 c2AG | FAd2 B2A2 | G2e2 c2AG | FAd2 DFAF | G2e2 c2AG |
FAd2 B2G2 | cedc BGAF | G2B2 G2 :|\
|: z2 | B2A2 G2F2 | EF (3GFE D2 EF | GFGA BABc |
 d2c2 A2d2 | B2A2 G2F2 | EF (3GFE D2d2 | e2dc BGAF | G2B2 G2 :|