first draft of mandatory parentheses around function definition param lists -- all tests pass

test/fixtures/execution/test_arguments.coffee

@@ -1,4 +1,4 @@
-area: x, y, x1, y1 =>
+area: (x, y, x1, y1) =>
   (x - x1) * (x - y1)
 
 x:  y:  10
@@ -18,14 +18,14 @@ print(area(
 
 
 # Arguments are turned into arrays.
-curried: =>
+curried: () =>
   print area.apply(this, arguments.concat(20, 20)) is 100
 
 curried 10, 10
 
 
 # Arguments is not a special keyword -- it can be assigned to:
-func: =>
+func: () =>
   arguments: 25
   arguments