message: Change `assignments::local()` to just use `Map::insert()` instead of entry API
diff: @@ -469,12 +469,10 @@ impl VariableStore for Shell {
  Ok(VariableType::Str(ref index)) => {
  match self.variables.get_mut(key.name) {
  Some(VariableType::HashMap(hmap)) => {
  - hmap.entry(index.clone())
  - .or_insert_with(|| VariableType::Str(value));
  + hmap.insert(index.clone(), VariableType::Str(value));
  }
  Some(VariableType::BTreeMap(bmap)) => {
  - bmap.entry(index.clone())
  - .or_insert_with(|| VariableType::Str(value));
  + bmap.insert(index.clone(), VariableType::Str(value));
  }
  Some(VariableType::Array(array)) => {
  let index_num = match index.parse::<usize>() {
  