led/todo.md

• Proper handling of non-uniform-width characters. Specifically, this needs to address tabs. But it should be done to handle the general case anyway, since that's unlikely to be more complex and will future-proof things.
• Line number display
• Editor info display (filename, current line/column, indentation style, etc.)
• File opening by entering path
• UI that wraps editors, for split view.
• Unit testing for text block, text node, and text buffer. They must be reliable!