Regularise use of repeats, tune (A/B/C etc.) markers and final bar. 1. Only show tune markers when a tune change is in the middle of a line. 2. Only show repeat starts |: if the repeat start is in the middle of a line. 3. Final bar end mark must be a thick line. The official rules for a repeat are that if there is no left repeat marker |: then the repeat starts at the previous double bar.

X:102
T:Harper's Frolick
S:Nick Barber
R:Polka
N:Change: ThreeAroundThree.abc
M:4/4
L:1/4
Q:160
K:D
A/G/ | "D" F A/F/ D A/G/ | "D" F A/F/ Dd | "A" cdec | "D" d/c/d/e/ f A/G/ |
   | "D" F A/F/ D A/G/ | "D" F A/F/ Dd | "A" cdec | "D" d3 :|
e | "D" f>e d/c/ d | "A" geeg | "D" fddf | "A" e/d/c/B/ A2 |
     | "D" f>e d/c/ d | "A" geeg | "D" fd "A" ec | "D" d2 d :|