abc2ly produces bad output

[rog peppe]

When I run abc2ly on the following ABC file, it produces invalid
lilypond souce text.  In particular, there are missing close-braces,
and a slurring ) is misplaced and has an invalid "-" prefixed.

When these problems are fixed, the beaming is wrong (it needs
a \partial 8 at the start).

X: 2
T: The Flooded Cellar
M: 4/4
C: R.P.
K: Dm
A|:cA^cA d3 f|ed^cd e^cAA|cA^cA d3f|1e^cAc d3A:|2 e^cAc d3d||
|:fdfg a3 a|1b2bg addd|fdfa gfed|^cAag fddd:|
|2 ((3gab) ag addA|cA^cA dfed|^cAag fdd2||