Rhythm improvements

• \slashedGrace now prints slashed beams.

  {
    \slashedGrace { d'16 e' d' } c'1
    \slashedGrace { d16 e'' d' } c'1
  }
  

  

  Using beam::slashed-stencil arbitrary beams may be slashed. Setting details.slash-side to RIGHT the slash is printed at right side of the beam.

  {
    \override Beam.stencil = #beam::slashed-stencil
    \cadenzaOn
    c'16^[ a' c'']
    c''^[ a' c']
    c'_[ a' c'']
    c''_[ a' c']
    \override Beam.details.slash-side = #RIGHT
    c'16^[ a' c'']
    c''^[ a' c']
    c'_[ a' c'']
    c''_[ a' c']
  }
  

  

  The appearence of the slash may be customized by overrides of the details subproperties over-beam-height, slash-slope, slash-side, slash-stem-fraction, slash-thickness, and slash-X-positions.

• It is now possible to right-align different types of bar lines.

  \new StaffGroup
    <<
      \new Staff { \textMark "default" b1 }
      \new Staff { b1 \section }
    >>
  
  \new StaffGroup
    <<
      \new Staff
        { \textMark "right-aligned" b1 }
      \new Staff
        { b1
          \override StaffGroup.BarLine.right-justified = ##t
          \section }
    >>
  

  

• Bar checks (|) now implicitly create contexts. The developers deem this unlikely to impact real-world scores. Please report a bug if you find a problem without an obvious workaround.
• The new option span-all-note-heads may be used to make tuplet brackets span all note heads (not just the stems) as recommended by Gould and Ross.

  

• Automatic beam subdivision has been reworked. Previously, many imperfections could be found in the results of automatic subdivision of many complex beaming patterns due to overreliance of the value of beatBase. Now, LilyPond can correctly subdivide most beaming patterns and no longer uses the value of beatBase to limit beam subdivision. Simply setting subdivideBeams to #t now automatically subdivides all intervals by default. 3 new properties have been introduced to tune automatic beam subdivision: minimumBeamSubdivisionInterval, maximumBeamSubdivisionInterval and respectIncompleteBeams. minimumBeamSubdivisionInterval limits subdivision intervals the same way as how beatBase previously did (reducing frequency of subdivided beams). maximumBeamSubdivisionInterval limits the number of beamlets removed at subdivisions in general. respectIncompleteBeams limits the number of beamlets at subdivisions where the remaining length would not complete the metric value of the subdivision. Setting minimumBeamSubdivisionInterval to the value of beatBase at all times, even when beatBase implicitly changes, preserves old behavior.
• New ‘stacked’ flag glyphs are available. All flag elements of a flag glyph have the same width but are vertically more compact.

  Use \flagStyleStacked to access them; with \flagStyleDefault you can switch back to the standard flag style.

  

• The TimeSignature style 'single-digit has been renamed to 'single-number.