..

original commit: 7e62c2557ca869207b733dce751c17fa69dbe918
2003-12-11 21:32:45 +00:00 · 2003-12-11 21:32:45 +00:00 · 40c5a4f242
commit 40c5a4f242
parent e83c09ba68
1 changed files with 2 additions and 1 deletions
--- a/collects/framework/framework.ss
+++ b/collects/framework/framework.ss
@ -101,7 +101,8 @@
    (opt-> (symbol? (symbol? any? . -> . any?))
           (boolean?)
           (-> void?))
-    (p f (weak? #f))
+    ((p f)
+     ((weak? #f)))
    "This function adds a callback which is called with a symbol naming a"
    "preference and it's value, when the preference changes."
    "\\rawscm{preferences:add-callback} returns a thunk, which when"