3.1.76 PercentRepeat  PercentRepeat objects are created by:
Percent_repeat_engraver.  Standard settings:  springs-and-rods
(boolean):   Dummy variable for triggering spacing routines.
stencil (unknown):   The symbol to print.  slope (number):   The
slope of this object.  thickness (number):   Line thickness,
generally measured in line-thickness.  dot-negative-kern
(number):   The space to remove between a dot and a slash in
percent repeat glyphs. Larger values bring the two elements
closer together.  font-encoding (symbol):   The font encoding is
the broadest category for selecting a font. Currently, only
lilypond’s system fonts (Emmentaler and Aybabtu) are using this
property. Available values are fetaMusic (Emmentaler),
fetaBraces (Aybabtu), fetaNumber (Emmentaler), and fetaDynamic
(Emmentaler).  This object supports the following interface(s):
spanner-interface, percent-repeat-interface, multi-measure-rest-
interface, font-interface and grob-interface.  Internals
Reference