Translations:Help:Lint errors/tidy-whitespace-bug/6/en

So, even if there are 30 spans in a row, since Tidy moves the whitespace, the browser can break rendering between spans. However, HTML5 parsers like Parsoid or RemexHTML will not move whitespace like this. So, there is no place for the browser to break the line since there is no whitespace between spans. This causes the row of spans to extend horizontally indefinitely.