message: Make test variable naming consistent. Use @ for arrays
diff: @@ -225,7 +225,7 @@ mod test {
  fn array(&self, variable: &str, _: Select) -> Option<Array> {
  match variable {
  - "$ARRAY" => Some(array!["a", "b", "c"].to_owned()),
  + "ARRAY" => Some(array!["a", "b", "c"].to_owned()),
  _ => None,
  }
  }
  @@ -468,7 +468,7 @@ mod test {
  fn test_reverse() {
  let method = ArrayMethod {
  method: "reverse",
  - variable: "$ARRAY",
  + variable: "@ARRAY",
  pattern: Pattern::StringPattern("3"),
  selection: Select::All,
  };
  