Clippy fixes

src/arc/headers.rs

@@ -152,7 +152,7 @@ impl Seal {
     }
 }
 
-impl<'x> AuthenticationResults<'x> {
+impl AuthenticationResults<'_> {
     pub(crate) fn write(&self, writer: &mut impl Writer, i: u32, as_header: bool) {
         writer.write(if !as_header {
             b"arc-authentication-results:"
@@ -168,7 +168,7 @@ impl<'x> AuthenticationResults<'x> {
             for &ch in self.auth_results.as_bytes() {
                 if !ch.is_ascii_whitespace() {
                     if last_is_space {
-                        writer.write(&[b' ']);
+                        writer.write(b" ");
                         last_is_space = false;
                     }
                     writer.write(&[ch]);
@@ -183,7 +183,7 @@ impl<'x> AuthenticationResults<'x> {
     }
 }
 
-impl<'x> HeaderWriter for ArcSet<'x> {
+impl HeaderWriter for ArcSet<'_> {
     fn write_header(&self, writer: &mut impl Writer) {
         self.seal.write(writer, true);
         self.signature.write(writer, true);

src/arc/mod.rs

@@ -123,7 +123,7 @@ impl VerifySignature for Seal {
     }
 }
 
-impl<'x> ArcOutput<'x> {
+impl ArcOutput<'_> {
     pub(crate) fn with_result(mut self, result: DkimResult) -> Self {
         self.result = result;
         self
@@ -134,7 +134,7 @@ impl<'x> ArcOutput<'x> {
     }
 }
 
-impl<'x> Default for ArcOutput<'x> {
+impl Default for ArcOutput<'_> {
     fn default() -> Self {
         Self {
             result: DkimResult::None,

src/arc/seal.rs

@@ -124,7 +124,7 @@ struct SignableSet<'a> {
     headers: CanonicalHeaders<'a>,
 }
 
-impl<'a> Writable for SignableSet<'a> {
+impl Writable for SignableSet<'_> {
     fn write(self, writer: &mut impl Writer) {
         self.headers.write(writer);
         self.set.signature.write(writer, false);
@@ -136,7 +136,7 @@ struct SignableChain<'a> {
     set: &'a ArcSet<'a>,
 }
 
-impl<'a> Writable for SignableChain<'a> {
+impl Writable for SignableChain<'_> {
     fn write(self, writer: &mut impl Writer) {
         if !self.arc_output.set.is_empty() {
             Canonicalization::Relaxed.canonicalize_headers(

src/common/auth_results.rs

@@ -149,14 +149,14 @@ impl<'x> AuthenticationResults<'x> {
     }
 }
 
-impl<'x> Display for AuthenticationResults<'x> {
+impl Display for AuthenticationResults<'_> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         f.write_str(self.hostname)?;
         f.write_str(&self.auth_results)
     }
 }
 
-impl<'x> HeaderWriter for AuthenticationResults<'x> {
+impl HeaderWriter for AuthenticationResults<'_> {
     fn write_header(&self, writer: &mut impl Writer) {
         writer.write(b"Authentication-Results: ");
         writer.write(self.hostname.as_bytes());

src/dkim/canonicalize.rs

@@ -200,7 +200,7 @@ pub struct CanonicalHeaders<'a> {
     headers: Vec<(&'a [u8], &'a [u8])>,
 }
 
-impl<'a> Writable for CanonicalHeaders<'a> {
+impl Writable for CanonicalHeaders<'_> {
     fn write(self, writer: &mut impl Writer) {
         self.canonicalization
             .canonicalize_headers(self.headers.into_iter().rev(), writer)

src/dkim/mod.rs

@@ -235,7 +235,7 @@ impl<'x> DkimOutput<'x> {
     }
 }
 
-impl<'x> ArcOutput<'x> {
+impl ArcOutput<'_> {
     pub fn result(&self) -> &DkimResult {
         &self.result
     }

src/dkim/sign.rs

@@ -96,7 +96,7 @@ pub(super) struct SignableMessage<'a> {
     signature: &'a Signature,
 }
 
-impl<'a> Writable for SignableMessage<'a> {
+impl Writable for SignableMessage<'_> {
     fn write(self, writer: &mut impl Writer) {
         self.headers.write(writer);
         self.signature.write(writer, false);