Disable docs and Debug for unexposed structs

src/stream/double_ended/nth_back.rs

@@ -4,6 +4,8 @@ use std::task::{Context, Poll};
 
 use crate::stream::DoubleEndedStream;
 
+#[doc(hidden)]
+#[allow(missing_debug_implementations)]
 pub struct NthBackFuture<'a, S> {
     stream: &'a mut S,
     n: usize,

src/stream/double_ended/rfind.rs

@@ -4,6 +4,8 @@ use std::pin::Pin;
 
 use crate::stream::DoubleEndedStream;
 
+#[doc(hidden)]
+#[allow(missing_debug_implementations)]
 pub struct RFindFuture<'a, S, P> {
     stream: &'a mut S,
     p: P,

src/stream/double_ended/rfold.rs

@@ -7,6 +7,8 @@ use pin_project_lite::pin_project;
 use crate::stream::DoubleEndedStream;
 
 pin_project! {
+    #[doc(hidden)]
+    #[allow(missing_debug_implementations)]
     pub struct RFoldFuture<S, F, B> {
         #[pin]
         stream: S,