use capitalize not title

quad/quad/scribblings/quad.scrbl

@@ -663,7 +663,7 @@ Vertical offset of font baseline (positive values move the baseline up, negative
 }
 
 @defthing[#:kind "attribute" font-case symbol?]{
-Case transformation of string. Possibilities are @racket["upper"], @racket["lower"], or @racket["title"].
+Case transformation of string. Possibilities are @racket["uppercase"], @racket["lowercase"], or @racket["capitalize"] (= first letter of each word is uppercase, the rest is lowercase).
 }
 
 @deftogether[(@defthing[#:kind "attribute" line-height symbol?]

quad/quadwriter/layout.rkt

@@ -152,7 +152,7 @@
   (define cased-str ((match (quad-ref q :font-case)
                        [(or "upper" "uppercase") string-upcase]
                        [(or "lower" "lowercase" "down" "downcase") string-downcase]
-                       [(or "title" "titlecase") string-titlecase]
+                       [(or "capitalize" "capitalized") string-titlecase]
                        [_ values]) (unsafe-car (quad-elems q))))
   (struct-copy
    string-quad q:string