message: EE-{1197,1198}: Use as_slice method
diff: @@ -667,7 +667,7 @@ where
  Trie::Extension { affix, .. },
  ) => {
  let mut new_affix: Vec<u8> = Vec::<u8>::from(affix);
  - new_affix.extend(Vec::<u8>::from(child_affix.to_owned()));
  + new_affix.extend_from_slice(child_affix.as_slice());
  *child_affix = new_affix.into();
  *trie_key = {
  let new_extension: Trie<K, V> = Trie::Extension {
  