Fixup with review comment

shioimm · hsbt · commit 52c266016324 · 2023-12-01T12:20:03.000+09:00
#9088 (comment)
diff --git a/test/socket/test_socket.rb b/test/socket/test_socket.rb
@@ -774,7 +774,7 @@ def test_resolurion_error_error_code
     begin
       Socket.getaddrinfo("example.com", 80, "AF_UNIX")
     rescue => e
-      assert_equal([Socket::EAI_FAMILY, Socket::EAI_FAIL].include?(e.error_code), true)
+      assert_include([Socket::EAI_FAMILY, Socket::EAI_FAIL], e.error_code)
     end
   end
 
