Applied review comments

library/std/src/sync/mpsc/mod.rs

@@ -1532,7 +1532,9 @@ impl<T: Send> error::Error for TrySendError<T> {
 #[stable(feature = "mpsc_error_conversions", since = "1.24.0")]
 impl<T> From<SendError<T>> for TrySendError<T> {
     /// Converts a `SendError<T>` into a `TrySendError<T>`.
+    ///
     /// This conversion always returns a `TrySendError::Disconnected` containing the data in the `SendError<T>`.
+    ///
     /// No data is allocated on the heap.
     fn from(err: SendError<T>) -> TrySendError<T> {
         match err {
@@ -1580,7 +1582,9 @@ impl error::Error for TryRecvError {
 #[stable(feature = "mpsc_error_conversions", since = "1.24.0")]
 impl From<RecvError> for TryRecvError {
     /// Converts a `RecvError` into a `TryRecvError`.
+    ///
     /// This conversion always returns `TryRecvError::Disconnected`.
+    ///
     /// No data is allocated on the heap.
     fn from(err: RecvError) -> TryRecvError {
         match err {
@@ -1613,7 +1617,9 @@ impl error::Error for RecvTimeoutError {
 #[stable(feature = "mpsc_error_conversions", since = "1.24.0")]
 impl From<RecvError> for RecvTimeoutError {
     /// Converts a `RecvError` into a `RecvTimeoutError`.
+    ///
     /// This conversion always returns `RecvTimeoutError::Disconnected`.
+    ///
     /// No data is allocated on the heap.
     fn from(err: RecvError) -> RecvTimeoutError {
         match err {