fix all the cases, much white noise, array to list, string to sym stuff

test/cases/while/while_method.tst

@@ -3,20 +3,21 @@ while(1)
   tmp.puts(i)
 end
 -- -- --
-s(:list,  [s(:while, 
-  s(:condition, 
-    s(:int,  1)), 
-  s(:expressions, 
-    s(:assign, 
-      s(:name,  "tmp"), 
+s(:expressions, 
+  s(:while, 
+    s(:condition, 
+      s(:int,  1)), 
+    s(:expressions, 
+      s(:assign, 
+        s(:name,  :tmp), 
+        s(:call, 
+          s(:name,  :new), 
+          s(:arguments), 
+          s(:receiver, 
+            s(:module,  "String")))), 
       s(:call, 
-        s(:name,  "new"), 
-        s(:arguments), 
+        s(:name,  :puts), 
+        s(:arguments, 
+          s(:name,  :i)), 
         s(:receiver, 
-          s(:module,  "String")))), 
-    s(:call, 
-      s(:name,  "puts"), 
-      s(:arguments, 
-        s(:name,  "i")), 
-      s(:receiver, 
-        s(:name,  "tmp")))))])
+          s(:name,  :tmp))))))