Renaming slice usage

collects/tests/web-server/private/request-test.rkt

@@ -1,6 +1,6 @@
 #lang racket
 (require rackunit
-         racket/slice
+         racket/submodule
          net/url
          web-server/private/connection-manager
          web-server/private/timer
@@ -162,6 +162,6 @@ another-footer: another-value
                   (binding:form-value (bindings-assq #"hello" (force (get-bindings "hello=world"))))
                   #"world")))))
 
-(slice test
+(module+ test
   (require rackunit/text-ui)
   (run-tests request-tests))

collects/tests/web-server/private/response-test.rkt

@@ -1,5 +1,5 @@
 #lang racket/base
-(require racket/slice
+(require racket/submodule
          rackunit
          racket/port
          xml/xml
@@ -307,6 +307,6 @@
                      (get-output-string os))
                   "")))))
 
-(slice test
+(module+ test
   (require rackunit/text-ui)
   (run-tests response-tests))