Resolve redundant_closure_call clippy lint

    error: try not to call a closure in the expression where it is declared
        --> serde/src/de/impls.rs:1590:76
         |
    1590 |                       <(_, u16)>::deserialize(deserializer).map(|(ip, port)| $new(ip, port))
         |                                                                              ^^^^^^^^^^^^^^
    ...
    1620 | / parse_socket_impl!("IPv6 socket address" net::SocketAddrV6, |ip, port| net::SocketAddrV6::new(
    1621 | |     ip, port, 0, 0
    1622 | | ));
         | |__- in this macro invocation
         |
         = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure_call
         = note: `-D clippy::redundant-closure-call` implied by `-D clippy::all`
         = note: this error originates in the macro `parse_socket_impl` (in Nightly builds, run with -Z macro-backtrace for more info)

Author: dtolnay

serde/src/de/impls.rs

@@ -1587,7 +1587,7 @@ macro_rules! parse_socket_impl {
                 if deserializer.is_human_readable() {
                     deserializer.deserialize_str(FromStrVisitor::new($expecting))
                 } else {
-                    <(_, u16)>::deserialize(deserializer).map(|(ip, port)| $new(ip, port))
+                    <(_, u16)>::deserialize(deserializer).map($new)
                 }
             }
         }
@@ -1614,12 +1614,10 @@ impl<'de> Deserialize<'de> for net::SocketAddr {
 }
 
 #[cfg(feature = "std")]
-parse_socket_impl!("IPv4 socket address" net::SocketAddrV4, net::SocketAddrV4::new);
+parse_socket_impl!("IPv4 socket address" net::SocketAddrV4, |(ip, port)| net::SocketAddrV4::new(ip, port));
 
 #[cfg(feature = "std")]
-parse_socket_impl!("IPv6 socket address" net::SocketAddrV6, |ip, port| net::SocketAddrV6::new(
-    ip, port, 0, 0
-));
+parse_socket_impl!("IPv6 socket address" net::SocketAddrV6, |(ip, port)| net::SocketAddrV6::new(ip, port, 0, 0));
 
 ////////////////////////////////////////////////////////////////////////////////