fix clippy in CI

Author: yoshuawuyts

src/future/future_group.rs

@@ -57,7 +57,6 @@ use crate::utils::{PollState, PollVec, WakerVec};
 /// assert_eq!(out, 10);
 /// # });}
 /// ```
-
 #[must_use = "`FutureGroup` does nothing if not iterated over"]
 #[pin_project::pin_project]
 pub struct FutureGroup<F> {

src/stream/stream_group.rs

@@ -42,7 +42,7 @@ use crate::utils::{PollState, PollVec, WakerVec};
 /// # futures_lite::future::block_on(async {
 /// let mut group = StreamGroup::new();
 /// group.insert(stream::once(4));
-
+///
 /// let mut index = 3;
 /// let mut out = 0;
 /// let mut group = group.lend_mut();