.

original commit: a7432874af0d8e8175b449832d45abee2b42fb99

collects/hierlist/hierlist-sig.ss

@@ -1,8 +1,8 @@
 
 (module hierlist-sig mzscheme
-  (import (lib "unitsig.ss"))
+  (require (lib "unitsig.ss"))
 
-  (export hierlist^)
+  (provide hierlist^)
   (define-signature hierlist^
     (hierarchical-list%
      hierarchical-list-item<%>

collects/hierlist/hierlist-unit.ss

@@ -1,13 +1,13 @@
 
 (module hierlist-unit mzscheme
-  (import (lib "unitsig.ss")
+  (require (lib "unitsig.ss")
 	  (lib "class.ss")
 	  (lib "mred-sig.ss" "mred")
 	  "hierlist-sig.ss")
 
-  (import (lib "list.ss"))
+  (require (lib "list.ss"))
 
-  (export hierlist@)
+  (provide hierlist@)
   (define hierlist@
     (unit/sig hierlist^
       (import mred^)

collects/hierlist/hierlist.ss

@@ -1,10 +1,10 @@
 
 (module hierlist mzscheme
-  (import (lib "unitsig.ss")
+  (require (lib "unitsig.ss")
 	  (lib "mred-sig.ss" "mred")
 	  (lib "mred.ss" "mred"))
 
-  (import "hierlist-sig.ss"
+  (require "hierlist-sig.ss"
 	  "hierlist-unit.ss")
 
 
@@ -13,7 +13,7 @@
     #f
     mred^)
 
-  (export-signature-elements hierlist^))
+  (provide-signature-elements hierlist^))
 
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