octets: no need to reference self as mut for copy_from_slice()
diff --git a/src/octets.rs b/src/octets.rs
index 1fed4db..1ffc85c 100644
--- a/src/octets.rs
+++ b/src/octets.rs
@@ -299,7 +299,7 @@
             return Ok(());
         }
 
-        &mut self.as_mut()[..len].copy_from_slice(v);
+        self.as_mut()[..len].copy_from_slice(v);
 
         self.off += len;