dualfroz
4e196d82d8
whitespace.render checked the loop bound only before writing a rune, then advanced by the rune width. A rune wider than the remaining space was still written, overshooting the requested width by up to runeWidth-1 cells, and this made the trailing space-fill unreachable. Stop before a wide rune would overflow and let the existing space-fill pad the remaining cells, so the result is always exactly the requested width. This also fixes overflow surfaced through Place/PlaceHorizontal with WithWhitespaceChars for multi-cell whitespace characters.