Correct typo in the Iterator adapters section

1 files changed, 1 insertions, 1 deletions

diff --git a/src/doc/guide.md b/src/doc/guide.md
index 6a27cf2f1ef..271d0bba924 100644
--- a/src/doc/guide.md
+++ b/src/doc/guide.md
@@ -4489,7 +4489,7 @@ This will print
 ```
 
 `filter()` is an adapter that takes a closure as an argument. This closure
-returns `true` or `false`. The new iterator `filter()` produces returns
+returns `true` or `false`. The new iterator `filter()` produces
 only the elements that that closure returned `true` for:
 
 ```{rust}