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

test/cases/module_def/module_assign_var.tst

@@ -2,6 +2,8 @@ module Opers
   abba = 5
 end
 -- -- --
-s(:list,  [s(:module,  "Opers",  [s(:assign, 
-  s(:name,  "abba"), 
-  s(:int,  5))])])
+s(:expressions, 
+  s(:module,  :Opers, 
+    s(:assign, 
+      s(:name,  :abba), 
+      s(:int,  5))))