Trim double Total output lines (#4787)

codex-rs/core/tests/suite/tools.rs

@@ -516,7 +516,6 @@ async fn shell_sandbox_denied_truncates_error_output() -> Result<()> {
 Wall time: [0-9]+(?:\.[0-9]+)? seconds
 Total output lines: \d+
 Output:
-Total output lines: \d+
 
 failed in sandbox: .*?(?:Operation not permitted|Permission denied|Read-only file system).*?
 \[\.{3} omitted \d+ of \d+ lines \.{3}\]
@@ -601,7 +600,6 @@ execution error: .*$"#;
 Wall time: [0-9]+(?:\.[0-9]+)? seconds
 Total output lines: \d+
 Output:
-Total output lines: \d+
 
 execution error: .*$"#;
     let spawn_error_regex = Regex::new(spawn_error_pattern)?;