(define minht (* 2 mudelapaperstaffheight))
(define maxht (* 7 minht))
(string-append
- "{\\bracefont " (char (/ (- (min y (- maxht step)) minht) step)) "}"))
-
+ "{\\bracefont " (char (max
+ 0
+ (/ (- (min y (- maxht step)) minht) step))) "}"))
+
(define (rulesym h w)