Fix Clippy needless_lifetimes warning

docs/src/string_writer.rs

@@ -2,7 +2,7 @@ use std::{io, str};
 
 pub struct StringWriter<'a>(pub &'a mut String);
 
-impl<'a> io::Write for StringWriter<'a> {
+impl io::Write for StringWriter<'_> {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
         str::from_utf8(buf)
             .map_err(|err| io::Error::new(io::ErrorKind::InvalidData, err))

docs/src/views.rs

@@ -88,7 +88,7 @@ pub fn main<'a>(
 
 struct Comrak<'a>(&'a AstNode<'a>);
 
-impl<'a> Render for Comrak<'a> {
+impl Render for Comrak<'_> {
     fn render_to(&self, buffer: &mut String) {
         let highlighter = Highlighter::get();
         comrak::format_html_with_plugins(
@@ -105,7 +105,7 @@ impl<'a> Render for Comrak<'a> {
 /// extra `<p>` tag that we don't want most of the time.
 struct ComrakRemovePTags<'a>(&'a AstNode<'a>);
 
-impl<'a> Render for ComrakRemovePTags<'a> {
+impl Render for ComrakRemovePTags<'_> {
     fn render(&self) -> Markup {
         let mut buffer = String::new();
         let highlighter = Highlighter::get();
@@ -128,7 +128,7 @@ impl<'a> Render for ComrakRemovePTags<'a> {
 
 struct ComrakText<'a>(&'a AstNode<'a>);
 
-impl<'a> Render for ComrakText<'a> {
+impl Render for ComrakText<'_> {
     fn render_to(&self, buffer: &mut String) {
         comrak::format_commonmark(self.0, &default_comrak_options(), &mut StringWriter(buffer))
             .unwrap();

maud/benches/complicated_maud.rs

@@ -41,7 +41,7 @@ mod btn {
         }
     }
 
-    impl<'a> Render for Button<'a> {
+    impl Render for Button<'_> {
         fn render(&self) -> Markup {
             match self.req_meth {
                 RequestMethod::Get => {

maud/src/lib.rs

@@ -50,7 +50,7 @@ impl<'a> Escaper<'a> {
     }
 }
 
-impl<'a> fmt::Write for Escaper<'a> {
+impl fmt::Write for Escaper<'_> {
     fn write_str(&mut self, s: &str) -> fmt::Result {
         escape::escape_to_string(s, self.0);
         Ok(())
@@ -120,25 +120,25 @@ impl Render for String {
     }
 }
 
-impl<'a> Render for Cow<'a, str> {
+impl Render for Cow<'_, str> {
     fn render_to(&self, w: &mut String) {
         str::render_to(self, w);
     }
 }
 
-impl<'a> Render for Arguments<'a> {
+impl Render for Arguments<'_> {
     fn render_to(&self, w: &mut String) {
         let _ = Escaper::new(w).write_fmt(*self);
     }
 }
 
-impl<'a, T: Render + ?Sized> Render for &'a T {
+impl<T: Render + ?Sized> Render for &T {
     fn render_to(&self, w: &mut String) {
         T::render_to(self, w);
     }
 }
 
-impl<'a, T: Render + ?Sized> Render for &'a mut T {
+impl<T: Render + ?Sized> Render for &mut T {
     fn render_to(&self, w: &mut String) {
         T::render_to(self, w);
     }
@@ -290,7 +290,7 @@ mod rocket_support {
     };
     use std::io::Cursor;
 
-    impl<'r> Responder<'r, 'static> for PreEscaped<String> {
+    impl Responder<'_, 'static> for PreEscaped<String> {
         fn respond_to(self, _: &Request) -> rocket::response::Result<'static> {
             Response::build()
                 .header(ContentType::HTML)