test,serve: adjust kill test to pass in ci

Author: Bogdanp

web-server-test/tests/web-server/serve-tests.rkt

@@ -125,7 +125,7 @@
          (check-equal? status #"HTTP/1.1 200 OK")
          (define data-promise
            (delay/thread
-            (port->bytes in)))
+            (read-line in)))
          (semaphore-wait started?-sema)
          (define stop-thds
            (for/list ([_ (in-range 2)])
@@ -136,7 +136,7 @@
           0 1 2)
          (check-equal?
           (force data-promise)
-          #"start\n")))))))
+          "start")))))))
 
 (module+ test
   (require rackunit/text-ui)