fix(nu-command/tests): further remove unnecessary pipeline() and cwd() (#8793)

# Description

This PR further fixes tests as part of #8670 

# User-Facing Changes

None

# Tests + Formatting

None

# After Submitting

None

---------

Signed-off-by: Harshal Chaudhari <harshal.chaudhary@gmail.com>
Co-authored-by: Reilly Wood <reilly.wood@icloud.com>

crates/nu-command/tests/commands/default.rs

@@ -21,13 +21,13 @@ fn adds_row_data_if_column_missing() {
 
         let actual = nu!(
             cwd: dirs.test(), pipeline(
-            r#"
+            "
                 open los_tres_amigos.json
                 | get amigos
                 | default 1 rusty_luck
                 | where rusty_luck == 1
                 | length
-            "#
+            "
         ));
 
         assert_eq!(actual.out, "2");