[css-ruby] Clarifications to auto-hiding text comparison

Author: fantasai

css-ruby/Overview.html

@@ -679,7 +679,7 @@ <h4 id=nested-pairing><span class=secno>2.3.1. </span> Nested Ruby</h4>
   <h3 id=autohide><span class=secno>2.4. </span> Autohiding Annotations</h3>
 
   <p>If a <a href="#ruby-annotation-box"><i>ruby annotation</i></a> has the
-   exact same content as its base, it is <dfn id=hidden
+   exact same text content as its base, it is <dfn id=hidden
    title="hidden ruby annotation | hidden annotation">hidden</dfn>. Hiding a
    <a href="#ruby-annotation-box"><i>ruby annotation</i></a> does not affect
    annotation pairing or the block-axis positioning of boxes in other <a
@@ -717,13 +717,14 @@ <h3 id=autohide><span class=secno>2.4. </span> Autohiding Annotations</h3>
    </div>
   </div>
 
-  <p class=note> Future levels of CSS Ruby may add controls for this, however
-   in this level it is always forced.
+  <p class=note> Future levels of CSS Ruby may add controls for this, but in
+   this level it is always forced.
 
   <p>The content comparison for this auto-hiding behavior takes place prior
-   to white space collapsing. <span class=issue>Is this easier? Or after
-   collapsing is easier? We should do whatever is easier, as it really
-   doesn't matter much which way to go. </span>
+   to white space collapsing and ignores elements (considers only the
+   <code>textContent</code> of the boxes). <span class=issue>Is before or
+   after white space collapsing easier?We should do whatever is easier, as it
+   really doesn't matter much which way to go. </span>
 
   <h3 id=white-space><span class=secno>2.5. </span> White Space</h3>
 

css-ruby/Overview.src.html

@@ -386,7 +386,7 @@ <h4 id="nested-pairing">
 <h3 id="autohide">
 Autohiding Annotations</h3>
 
-	<p>If a <i>ruby annotation</i> has the exact same content as its base,
+	<p>If a <i>ruby annotation</i> has the exact same text content as its base,
 	it is <dfn title="hidden ruby annotation | hidden annotation">hidden</dfn>.
 	Hiding a <i>ruby annotation</i> does not affect annotation pairing
 	or the block-axis positioning of boxes in other <i>levels</i>.
@@ -417,11 +417,12 @@ <h3 id="autohide">
 
 	<p class="note">
 		Future levels of CSS Ruby may add controls for this,
-		however in this level it is always forced.
+		but in this level it is always forced.
 
 	<p>The content comparison for this auto-hiding behavior
-	takes place prior to white space collapsing.
-	<span class="issue">Is this easier? Or after collapsing is easier? We should do whatever is easier, as it really doesn't matter much which way to go.
+	takes place prior to white space collapsing
+	and ignores elements (considers only the <code>textContent</code> of the boxes).
+	<span class="issue">Is before or after white space collapsing easier?We should do whatever is easier, as it really doesn't matter much which way to go.
 
 <h3 id="white-space">
 White Space</h3>