[css-text-decor] More introductory text for text-emphasis

--HG--
extra : rebase_source : 65a6cf3cfd8c2082b820db8c0566cb2bff26762d

Author: fantasai

css-text-decor/Overview.html

@@ -1150,6 +1150,18 @@ <h2 id=emphasis-marks><span class=secno>3. </span> Emphasis Marks</h2>
     Japanese text
   </div>
 
+  <p>The ‘<a href="#text-emphasis"><code
+   class=property>text-emphasis</code></a>’ shorthand, and its ‘<a
+   href="#text-emphasis-style"><code
+   class=property>text-emphasis-style</code></a>’ and ‘<a
+   href="#text-emphasis-color"><code
+   class=property>text-emphasis-color</code></a>’ longhands, can be used to
+   apply such marks to the text. The ‘<a
+   href="#text-emphasis-position"><code
+   class=property>text-emphasis-position</code></a>’ property, which
+   inherits separately, allows setting the emphasis marks’ position with
+   respect to the text.
+
   <h3 id=text-emphasis-style-property><span class=secno>3.1. </span> Emphasis
    Mark Style: the ‘<a href="#text-emphasis-style"><code
    class=property>text-emphasis-style</code></a>’ property</h3>

css-text-decor/Overview.src.html

@@ -787,6 +787,11 @@ <h2 id="emphasis-marks">
     <p class="caption">Accent emphasis (shown in blue for clarity) applied to Japanese text</p>
   </div>
 
+  <p>The 'text-emphasis' shorthand, and its 'text-emphasis-style' and 'text-emphasis-color' longhands,
+  can be used to apply such marks to the text.
+  The 'text-emphasis-position' property, which inherits separately,
+  allows setting the emphasis marks’ position with respect to the text.
+
 <h3 id="text-emphasis-style-property">
 Emphasis Mark Style: the 'text-emphasis-style' property</h3>