Proofread doc for SinkExt::feed*

Author: mzabaluev

futures-util/src/sink/mod.rs

@@ -220,7 +220,7 @@ pub trait SinkExt<Item>: Sink<Item> {
     /// by the sink.
     ///
     /// Unlike `send`, the returned future does not flush the sink.
-    /// It is the responsibility of the caller to ensure all pending items
+    /// It is the caller's responsibility to ensure all pending items
     /// are processed, which can be done via `flush` or `close`.
     fn feed(&mut self, item: Item) -> Feed<'_, Self, Item>
         where Self: Unpin,
@@ -259,7 +259,7 @@ pub trait SinkExt<Item>: Sink<Item> {
     ///
     /// Unlike `send_all`, the returned future does not fully flush the sink
     /// before completion.
-    /// It is the responsibility of the caller to ensure all pending items
+    /// It is the caller's responsibility to ensure all pending items
     /// are processed, which can be done via `flush` or `close`.
     fn feed_all<'a, St>(
         &'a mut self,
@@ -303,7 +303,7 @@ pub trait SinkExt<Item>: Sink<Item> {
     {
         CompatSink::new(self)
     }
-    
+
     /// A convenience method for calling [`Sink::poll_ready`] on [`Unpin`]
     /// sink types.
     fn poll_ready_unpin(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>