Provide function to offset columned Fingerings
Introduces
- event-funcetion offsetFingering in ly/music-functions-init.ly
- snippet offsetting-columned-fingerings.ly in Documentation/snippets/new/
- regtest input/regression/fingering-offset-column.ly Extends Documentation/en/notation/editorial.itely Extends Documentation/en/changes.tely Includes running makelsr