chore: fix clippy lints (#707)

tonic-web/src/call.rs

@@ -235,7 +235,7 @@ impl Encoding {
         Self::from_header(headers.get(header::ACCEPT))
     }
 
-    pub(crate) fn to_content_type(&self) -> &'static str {
+    pub(crate) fn to_content_type(self) -> &'static str {
         match self {
             Encoding::Base64 => GRPC_WEB_TEXT_PROTO,
             Encoding::None => GRPC_WEB_PROTO,

tonic-web/src/cors.rs

@@ -161,7 +161,7 @@ mod tests {
         ($header:expr, $expected:expr) => {
             fn sorted(value: &str) -> Vec<&str> {
                 let mut vec = value.split(",").collect::<Vec<_>>();
-                vec.sort();
+                vec.sort_unstable();
                 vec
             }