Merge rust-bitcoin/rust-bitcoin#3428: CI fixes for latest nightly

c2674caf4c clippy: remove some newly-detected unnecessary returns (Andrew Poelstra)
053a633b27 clippy: change accidental doccomments into correct comments (Andrew Poelstra)

Pull request description:

  Blocking #3427

ACKs for top commit:
  tcharding:
    ACK c2674caf4c

Tree-SHA512: 4e24e988cb27b47354c7f7b3474fc6647386379fe2e7581dde57daab75fd11d3a511084f5d00c7421d42cd40c69ecfaf10764943d97f1594479ae250687fa279

bitcoin/src/p2p/message_network.rs

@@ -15,7 +15,7 @@ use crate::p2p::address::Address;
 use crate::p2p::ServiceFlags;
 use crate::prelude::{Cow, String};
 
-/// Some simple messages
+// Some simple messages
 
 /// The `version` message
 #[derive(PartialEq, Eq, Clone, Debug)]

bitcoin/src/serde_utils.rs

@@ -276,7 +276,7 @@ pub mod hex_bytes {
                 if let Ok(hex) = core::str::from_utf8(v) {
                     FromHex::from_hex(hex).map_err(E::custom)
                 } else {
-                    return Err(E::invalid_value(serde::de::Unexpected::Bytes(v), &self));
+                    Err(E::invalid_value(serde::de::Unexpected::Bytes(v), &self))
                 }
             }
 

hashes/src/serde_macros.rs

@@ -31,7 +31,7 @@ pub mod serde_details {
             if let Ok(hex) = str::from_utf8(v) {
                 hex.parse::<Self::Value>().map_err(E::custom)
             } else {
-                return Err(E::invalid_value(de::Unexpected::Bytes(v), &self));
+                Err(E::invalid_value(de::Unexpected::Bytes(v), &self))
             }
         }
 

internals/src/parse.rs

@@ -1,4 +1,4 @@
-/// Support for parsing strings.
+//! Support for parsing strings.
 
 // Impls a single TryFrom conversion
 #[doc(hidden)]