support , in < >

[felixroos]

changes the mini parser slightly to support "," inside "< ... >", which allows using them for polymeters.
These two are now equivalent:

s("<bd rim, hh hh oh>*2")
s("{bd rim, hh hh oh}%2")

iirc this is also how it works in tidal (have to recheck)

[yaxu]

Yep!

ghci> drawLine "{a b, c d e}%2"

[26 cycles]
|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab
|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec
ghci> drawLine "<a b, c d e>*2"

[26 cycles]
|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab|ab
|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec|de|cd|ec