1. Non-breaking space \u00A0, mainly used in office, so that a word will not be displayed in a new line at the end, shortcut key ctrl+shift+space; 2. Half-width space (English symbol) \u0020, commonly used in code; 3 .Full-width space (Chinese symbol) \u3000, used in Chinese articles;
Lua uses \u{00A0}
tmp newline<br> <nobr>