Percent repeats

[Malte Meyn]

Hi list,

in the LilyPond facebook group someone reported again issue 3146 
(https://sourceforge.net/p/testlilyissues/issues/3146/). Before I looked 
at the tracker I tried to find a solution in Scheme but then I saw that

1. almost the whole thing is written in C++ and thus not changeable for 
a “normal” user
2. there are different Events, Grobs and Engravers for percent repeats 
lasting 2 measures, 1 measure, and other durations:

\version "2.19.65"

{
  \override RepeatSlash.color = #blue
  \override PercentRepeat.color = #red
  \override DoublePercentRepeat.color = #magenta
  \repeat percent 4 { a16 b a b }
  \repeat percent 2 { a1 }
  \repeat percent 2 { a b }
  \repeat percent 2 { a b a b }
}

IMO that’s very confusing; would it be possible to have a more 
consistent way to print percent repeats?

Cheers,
Malte