Change in the syntax of attributes

Attributes changed to posfixed ('x <const>', instead of '<const> x'),
and "toclose" renamed to "close". Posfixed attributes seem to make it
clearer that it applies to only one variable when there are multiple
variables.

testes/goto.lua

@@ -258,7 +258,7 @@ do
   ::L2:: goto L3
 
   ::L1:: do
-    local <toclose> a = setmetatable({}, {__close = function () X = true end})
+    local a <close> = setmetatable({}, {__close = function () X = true end})
     assert(X == nil)
     if a then goto L2 end   -- jumping back out of scope of 'a'
   end