Melody engraver enhancement

[Simon Albrecht]

Hello everybody,

in the attached example, two tied notes (of the same pitch) in different 
bars have their stems placed in different directions by the melody 
engraver. This is very confusing, so the engraver should take ties 
between notes of the same pitch (that is, as opposed to bis~ c for 
example) into account (and use \downStem in case of doubt...).

Yours sincerely,
Simon

ties-and-melody-engraver.ly
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ties-and-melody-engraver.png
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