Issue 514 in lilypond: abc2ly grace notes

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Issue 514: abc2ly grace notes
http://code.google.com/p/lilypond/issues/detail?id=514

Comment #1 by gpermus:
More abc2ly grace note unhappiness:

This problem arises when generating .ly files using "abc2ly 
--beams=None" (version
2.11.34), which generate mismatch beaming "[" and \grace{...}. When 
LilyPond compiles
this file, the grace notes will be replaced by 1/4 pointing the wrong 
way, and will
further also on grace notes further down which are syntactically 
correct. So LilyPond
has not only a a problem of not being able to generate a decent output 
given the
syntax error, but also cannot recover properly from the error.

An ABC source file

T:abc2ly grace note bug
M:C
L:1/8
Q:1/4=120
K:E Dorian
{ga}gdgb {a}g>d g<a|

compiled using "abc2ly --beams=None" generates code of the form
...
\grace {    gis''8[    a''8  }   gis''8    dis''8
gis''8    b''8]  \grace {    a''8  }   gis''8.[    dis''16]    gis''16[
a''8.]
...

Here, the first "[" within the \grace{...} construct does not have a closing 
"]".
However, the code is after is closing "]" correct. But also the second 
\grace{...}
gets a funny putout. It looks as in the attachment.




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