Mismatched xml tags for exit_review_mode user message

This is the code for exit_review_mode in codex.rs:

        user_message.push_str(&format!(
            r#"<user_action>
  <context>User initiated a review task. Here's the full review output from reviewer model. User may select one or more comments to resolve.</context>
  <action>review</action>
  <results>
  {findings_str}
  </results>
</user_tool>

Observe that it has mismatched XML tags: <user_action></user_tool>