Add list output for to html (#2273)

crates/nu-protocol/src/value.rs

@@ -28,6 +28,7 @@ use serde::{Deserialize, Serialize};
 use std::hash::{Hash, Hasher};
 use std::path::PathBuf;
 use std::time::SystemTime;
+
 /// The core structured values that flow through a pipeline
 #[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash, Serialize, Deserialize)]
 pub enum UntaggedValue {