Fix multiple issues with def --wrapped help example

crates/nu-cmd-lang/src/core_commands/def.rs

@@ -67,8 +67,8 @@ impl Command for Def {
             },
             Example {
                 description: "Define a custom wrapper for an external command",
-                example: r#"def --wrapped my-echo [...rest] { echo $rest }; my-echo spam"#,
-                result: Some(Value::test_list(vec![Value::test_string("spam")])),
+                example: r#"def --wrapped my-echo [...rest] { ^echo ...$rest }; my-echo -e 'spam\tspam'"#,
+                result: Some(Value::test_string("spam\tspam")),
             },
         ]
     }