padRight function
Pads text to width with trailing spaces.
If text is already at or longer than width, returns text unchanged.
Example:
padRight('Hi', 5); // 'Hi '
padRight('Hello', 3); // 'Hello'
Implementation
String padRight(String text, int width) {
if (text.length >= width) return text;
return text + ' ' * (width - text.length);
}