Fix typo

Author: kojiishi

css3-text/Overview.html

@@ -1436,8 +1436,8 @@ <h3 id=word-break><span class=secno>4.2. </span> Word Breaking Rules: the
    <dd>Break opportunties between ID/ID, AL/ID, and ID/AL as defined in <a
     href="#UAX14" rel=biblioentry>[UAX14]<!--{{UAX14}}--></a> are prohibited.
     Otherwise this option is equivalent to &lsquo;<code
-    class=css>normal</code>&rsquo;. This option produces a style where a
-    sequence of ideographic characters do not break, and word separator
+    class=css>normal</code>&rsquo;. This option produces a style where
+    sequences of ideographic characters do not break, and word separator
     characters are present to create line-breaking opportunities. Such sytle
     is sometimes seen in Korean magazines, and is also useful for
     mixed-script text where CJK snippets are mixed into another language that