diff --git a/advanced-iterators.html b/advanced-iterators.html
index da407d7..d613676 100755
--- a/advanced-iterators.html
+++ b/advanced-iterators.html
@@ -205,7 +205,7 @@ AssertionError: Only for very large values of 2
>>> tuple(ord(c) for c in unique_characters) ④
(69, 68, 77, 79, 78, 83, 82, 89)
-- A generator expression is like an anonymous function that yields values. The expression itself looks like a list comprehension [FIXME have we introduced this yet?], but it’s wrapped in parentheses instead of square brackets.
+
- A generator expression is like an anonymous function that yields values. The expression itself looks like a list comprehension [FIXME xref], but it’s wrapped in parentheses instead of square brackets.
- The generator expression returns… an iterator.
- Calling
next(gen) returns the next value from the iterator.
- If you like, you can iterate through all the possible values and return a tuple, list, or set, by passing the generator expression to
tuple(), list(), or set(). In these cases, you don’t need an extra set of parentheses — just pass the “bare” expression ord(c) for c in unique_characters to the tuple() function, and Python figures out that it’s a generator expression.