Fixing 4.x grammar to be backward compatible.

Added 3.x unit tests back to show this.

unittests/for_each_range.chai

@@ -1,3 +1,3 @@
-auto v = {1,2,3};
+auto v = [1,2,3];
 auto r = range(v);
-for_each(r, [](x) { assert_equal(true, x>0); } )
+for_each(r, fun(x) { assert_equal(true, x>0); } )