using 'where' for array comprehension filtering, after kamatsu's suggestion -- execution tests pass now with significant whitespace

test/fixtures/execution/test_everything.coffee

@@ -1,6 +1,7 @@
 func: =>
   a: 3
   b: []
+
   while a >= 0
     b.push('o')
     a--
@@ -20,7 +21,7 @@ func: =>
     text = c.text
   }
 
-  c.list: l for l in d.text.split('') if l is '-'
+  c.list: l for l in d.text.split('') where l is '-'
 
   c.single: c.list[1..1][0]