Use real contract in bitmap% docs

(cherry picked from commit 2fdc56db3a)
2011-07-13 15:34:55 -04:00 · 2011-07-13 15:34:55 -04:00 · 60f3e79bb8
commit 60f3e79bb8
parent 8d0d481d63
1 changed files with 1 additions and 1 deletions
--- a/collects/scribblings/draw/bitmap-class.scrbl
+++ b/collects/scribblings/draw/bitmap-class.scrbl
@ -62,7 +62,7 @@ When a @racket[bits] byte string is provided: Creates a monochrome
                            [y real?]
                            [width exact-nonnegative-integer?]
                            [height exact-nonnegative-integer?]
-                            [pixels (and/c bytes? mutable?)]
+                            [pixels (and/c bytes? (not/c immutable?))]
                            [just-alpha? any/c #f]
                            [pre-multiplied? any/c #f])
           void?]{