Change nix fn sig

Author: rscarson

Diff for: src/ext/io/tty_unix.rs

@@ -227,7 +227,7 @@ pub fn op_read_line_prompt(
     let mut editor =
         Editor::<(), rustyline::history::DefaultHistory>::new().expect("Failed to create editor.");
 
-    editor.set_keyseq_timeout(Some(1));
+    editor.set_keyseq_timeout(1);
     editor.bind_sequence(KeyEvent(KeyCode::Esc, Modifiers::empty()), Cmd::Interrupt);
 
     let read_result = editor.readline_with_initial(prompt_text, (default_value, ""));