implement clippy lints from merge

Author: yoshuawuyts

src/client/decode.rs

@@ -92,12 +92,9 @@ where
     }
 
     // Check for Content-Length.
-    match content_length {
-        Some(len) => {
-            let len = len.last().unwrap().as_str().parse::<usize>()?;
-            res.set_body(Body::from_reader(reader.take(len as u64), Some(len)));
-        }
-        None => {}
+    if let Some(len) = content_length {
+        let len = len.last().unwrap().as_str().parse::<usize>()?;
+        res.set_body(Body::from_reader(reader.take(len as u64), Some(len)));
     }
 
     // Return the response.

src/client/encode.rs

@@ -115,7 +115,7 @@ impl Read for Encoder {
         if !self.headers_done {
             let len = std::cmp::min(self.headers.len() - self.cursor, buf.len());
             let range = self.cursor..self.cursor + len;
-            buf[0..len].copy_from_slice(&mut self.headers[range]);
+            buf[0..len].copy_from_slice(&self.headers[range]);
             self.cursor += len;
             if self.cursor == self.headers.len() {
                 self.headers_done = true;