[fine] Some resilience, a design improvement for iterator

fine/tests/expression/errors/wild_member_access.fine

@@ -11,8 +11,12 @@ fun test() {
 //       We need to make sure things are parsed correctly.
 //
 // TODO: Better parser recovery will improve the specifics of the errors.
+//
+// TODO: This is parsed wrong; the `{` is consumed after the '.' and it
+// should instead be ignored. This is the "greedy" expression parsing that
+// matklad talks about in his resilient parser article.
+//
 // @expect-errors:
 // | 7:12: Error at '{': expected an expression
-// | 7:13: Error at 'let': expect ';' to end a let statement
 // | 7:26: cannot find value foo here
 // | 8:0: Error at '}': unbalanced '}'