[css-text] Add overflow-wrap to overview of hyphenation section

Author: fantasai

css-text/Overview.html

@@ -246,7 +246,8 @@ <h2 class="no-num no-toc" id=contents> Table of Contents</h2>
       property</a>
     </ul>
 
-   <li><a href="#hyphenation"><span class=secno>6. </span>Hyphenation</a>
+   <li><a href="#hyphenation"><span class=secno>6. </span>Breaking Within
+    Words</a>
     <ul class=toc>
      <li><a href="#hyphens"><span class=secno>6.1. </span>Hyphenation
       Control: the ‘<code class=property>hyphens</code>’ property</a>
@@ -1438,7 +1439,7 @@ <h3 id=word-break><span class=secno>5.3. </span> Breaking Rules for
    due to ‘<code class=css>break-all</code>’, the characters must still
    be shaped as if the word were not broken.
 
-  <h2 id=hyphenation><span class=secno>6. </span>Hyphenation</h2>
+  <h2 id=hyphenation><span class=secno>6. </span>Breaking Within Words</h2>
 
   <p><dfn id=hyphenation0 title="hyphenation|hyphenate">Hyphenation</dfn>
    allows the controlled splitting of words to improve the layout of
@@ -1462,6 +1463,11 @@ <h2 id=hyphenation><span class=secno>6. </span>Hyphenation</h2>
          which is particularly important in long-word languages like German.
          https://bugzilla.mozilla.org/show_bug.cgi?id=418975 -->
 
+  <p>CSS also provides the ‘<a href="#overflow-wrap0"><code
+   class=property>overflow-wrap</code></a>’ property, which can allow
+   arbitrary breaking within words when the text would otherwise overflow its
+   container.
+
   <h3 id=hyphens><span class=secno>6.1. </span>Hyphenation Control: the ‘<a
    href="#hyphens0"><code class=property>hyphens</code></a>’ property</h3>
 

css-text/Overview.src.html

@@ -1033,7 +1033,7 @@ <h3 id="word-break">
       due to ''break-all'', the characters must still be shaped as if the
       word were not broken.</p>
 
-<h2 id="hyphenation">Hyphenation</h2>
+<h2 id="hyphenation">Breaking Within Words</h2>
 
     <p><dfn title="hyphenation|hyphenate">Hyphenation</dfn>
       allows the controlled splitting of words
@@ -1057,6 +1057,10 @@ <h2 id="hyphenation">Hyphenation</h2>
          which is particularly important in long-word languages like German.
          https://bugzilla.mozilla.org/show_bug.cgi?id=418975 -->
 
+    <p>CSS also provides the 'overflow-wrap' property, which can allow
+      arbitrary breaking within words when the text would otherwise overflow
+      its container.
+
   <h3 id="hyphens">Hyphenation Control: the 'hyphens' property</h3>
 
     <table class=propdef>