[css-ruby] Fix missing resets for size, line-height. Fixes w3c#760.

Author: fantasai

css-ruby/Overview.bs

@@ -1451,7 +1451,7 @@ Appendix A: Default Style Sheet</h2>
 
 	<pre>ruby, rb, rt, rbc, rtc, rp {
 <!--	-->  display: inline; white-space: inherit;
-<!--	-->  font-variant-east-asian: inherit; text-emphasis: inherit; }</pre>
+<!--	-->  font: inherit; text-emphasis: inherit; }</pre>
 
 <h3 id="default-parens" class="no-num">
 <span class="secno">A.3</span> Generating Parentheses</h3>