fixup! go/client/zurl: Sync format to py upstream

I realized a minor mistake I did in writing the tests that needs to
be fixed in order to have reliable test results.

/reviewed-by @kirr
/reviewed-on !9

go/neo/client_test.go

@@ -697,7 +697,7 @@ func TestParseURL(t *testing.T) {
 	u := "neos://test@127.0.0.1?ca=ca&cert=cert&key=key"
 	testParseURL(t, u, urlInfo{netcfg: neonet.Config{CA: "ca", Cert: "cert", Key: "key"}})
 	// With query parameters
-	u = "neo://test@127.0.0.1/compress=true&logfile=n.log&cache-size=256"
+	u = "neo://test@127.0.0.1?compress=true&logfile=n.log&cache-size=256"
 	testParseURL(t, u, urlInfo{})
 	// Emtpy query parameters must be ignored (if they wouldn't
 	// be ignored, parseURL should raise an error).