⚡ update test files

test/coroutine.nas

@@ -73,7 +73,7 @@ println("coroutine state:\e[91m ",coroutine.status(co),"\e[0m");
 println("ok");
 
 # pressure test
-var main=func(){
+for(var t=0;t<5;t+=1){
     var productor=func(){
         for(var i=0;;i+=1)
             coroutine.yield(i);
@@ -96,7 +96,4 @@ var main=func(){
     while(tm.elapsedMSec()<total)
         consumer();
     println();
-}
-
-for(var i=0;i<5;i+=1)
-    main();
+}