[1] Difference between SVG1.1 and SVG 2 for 'letter-spacing' and 'word-sp… ( (Tavmjong著, 2016-06-19 19:43:25 +09:00)) <https://github.com/w3c/svgwg/commit/9237e7288027fa94146f3d2e300021334abaa3fc>