[css-text] Move some paragraphs.

--HG--
extra : rebase_source : 18b4c4f8b271e89e3ed9e4e734dfedbcf2b52da1

Author: fantasai

css-text/Overview.bs

@@ -253,6 +253,15 @@ Characters and Letters</h4>
 <h4 id="languages">
 Languages and Typesetting</h4>
 
+  <p class="note">
+    Many typographic effects vary by linguistic context.
+    In CSS, language-specific typographic tailorings
+    are only applied when the content language is known (declared).
+
+  <p><strong class="advisement">
+    Authors should language-tag their content accurately for the best typographic behavior.
+  </strong>
+
   <p>The <dfn>content language</dfn> of an element is the (human) language
     the element is declared to be in, according to the rules of the
     <a href="http://www.w3.org/TR/CSS21/conform.html#doclanguage">document language</a>.
@@ -264,13 +273,6 @@ Languages and Typesetting</h4>
     Note that it is possible for the <i>content language</i> of an element
     to be unknown.
 
-  <p class="note">
-    Many typographic effects vary by linguistic context.
-    In CSS, language-specific typographic tailorings
-    are only applied when the content language is known (declared).
-
-  <strong class="advisement">Authors should language-tag their content accurately for the best typographic behavior.</strong>
-
 <h2 id="transforming">
   Transforming Text</h2>