[JW Lua] Slur metrics returns wrong values (from time to time)

[Chris]

Hello Jan

This is perhaps the solution of your problem.
The values of"Smart shape placement" are not always those displayed.
They depends on the parameter "Smart Slur Options -> Tips avoid Staff 
Lines By".
By unchecking this option, I think the values are correct.
(but CalcRightEntryMetricPos depends of scalings)

Best

Chris

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