fmt: replace go with spawn

vlib/vweb/csrf/csrf_test.v

@@ -19,7 +19,7 @@ fn (mut app App) index() vweb.Result {
 }
 
 fn test_send_a_request_to_homepage_expecting_a_csrf_cookie() {
-	go vweb.run_at(&App{}, vweb.RunParams{ port: sport })
+	spawn vweb.run_at(&App{}, vweb.RunParams{ port: sport })
 	time.sleep(500 * time.millisecond)
 	res := http.get('http://localhost:$sport/')?
 	if res.header.str().contains('__Host-Csrf-Token') {

vlib/vweb/tests/vweb_test.v

@@ -46,7 +46,7 @@ fn test_a_simple_vweb_app_runs_in_the_background() {
 		eprintln('running:\n$server_exec_cmd')
 	}
 	$if windows {
-		go os.system(server_exec_cmd)
+		spawn os.system(server_exec_cmd)
 	} $else {
 		res := os.system(server_exec_cmd)
 		assert res == 0

vlib/vweb/tests/vweb_test_server.v

@@ -33,7 +33,7 @@ fn main() {
 	assert http_port > 0
 	timeout := os.args[2].int()
 	assert timeout > 0
-	go exit_after_timeout(timeout)
+	spawn exit_after_timeout(timeout)
 	//
 	shared config := &Config{
 		max_ping: 50
@@ -108,7 +108,7 @@ pub fn (mut app App) shutdown() vweb.Result {
 	if session_key != 'superman' {
 		return app.not_found()
 	}
-	go app.gracefull_exit()
+	spawn app.gracefull_exit()
 	return app.ok('good bye')
 }
 

vlib/vweb/vweb.v

@@ -433,7 +433,7 @@ pub fn run_at<T>(global_app &T, params RunParams) ! {
 			eprintln('accept() failed with error: $err.msg()')
 			continue
 		}
-		go handle_conn<T>(mut conn, mut request_app, routes)
+		spawn handle_conn<T>(mut conn, mut request_app, routes)
 	}
 }
 

vlib/vweb/vweb_app_test.v

@@ -18,7 +18,7 @@ struct Article {
 }
 
 fn test_a_vweb_application_compiles() {
-	go fn () {
+	spawn fn () {
 		time.sleep(2 * time.second)
 		exit(0)
 	}()