[css-writing-modes] Fix typo <https://lists.w3.org/Archives/Public/www-style/2015Jun/0256.html>

Author: kojiishi

css-writing-modes/Overview.bs

@@ -2510,7 +2510,7 @@ Text Run Rules</h4>
     <p>no text would combine: the 12 and 34 both share an ancestor with the same 'text-combine-upright' value,
     and therefore are considered part of a sequence of four combinable digits interrupted by a box boundary.
     However in these cases:
-    <pre>12&lt;tcy&gt;&lt;span>34&gt;&lt;/span>&lt;/tcy>
+    <pre>12&lt;tcy&gt;&lt;span>34&lt;/span>&lt;/tcy>
 12&lt;tcy&gt;&lt;span>&lt;/span>34&lt;/tcy>
 12&lt;tcy&gt;34&lt;span>&lt;/span>&lt;/tcy></pre>
     <p>The 34 would combine, because the 12 immediately previous does not share with the 34 an ancestor with a common 'text-combine-upright',