Sync up to trunk.

svn: r18493

collects/2htdp/info.ss

@@ -2,8 +2,4 @@
 
 (define name "HtDP/2e Teachpacks")
 (define compile-omit-paths
-  '("hangman-world.ss"
-    "hangman-world-play.ss"
-    "tests"
-    "extended-key"
-    "utest"))
+  '("tests" "uchat" "utest"))

collects/2htdp/private/check-aux.ss

@@ -1,3 +1,4 @@
+
 #lang scheme
 
 (require htdp/error)
@@ -84,6 +85,7 @@
     [(string? x) true]
     [(symbol? x) true]
     [(number? x) true]
+    [(boolean? x) true]
     [(char? x) true]
     [(pair? x) (and (list? x) (andmap sexp? x))]
     [else false]))

collects/repos-time-stamp/stamp.ss

@@ -1 +1 @@
-#lang scheme/base (provide stamp) (define stamp "8mar2010")
+#lang scheme/base (provide stamp) (define stamp "9mar2010")