[css-text-3] Simplify examples. #5759

css-text-3/Overview.bs

@@ -5721,51 +5721,37 @@ Bidirectionality and Line Boxes</h3>
 
 
   <div class="example">
-    <p>In the following example:
+    <p>Because neutral characters (such as punctuation)
+    and isolated runs are skipped
+    when <a href="http://unicode.org/reports/tr9/#P2">finding the inline base direction of a plaintext bidi paragraph</a>,
+    the line box in the following example will be left-to-right
+    (and thus left-aligned given ''text-align: start''),
+    as dictated by the first strong character, ‘h’:
     <pre>
       &lt;para style="display: block; direction: rtl; unicode-bidi:plaintext">
-      &lt;quote style="unicode-bidi:plaintext">שלום!&lt;/quote>", he said.
+      “&lt;quote style="unicode-bidi:plaintext">שלום!&lt;/quote>”, he said.
       &lt;/para&gt;</pre>
-
-    <p>The result should be a left-aligned line looking like this:
-    <pre>"!&#1513;&#1500;&#1493;&#1501;", he said.</pre>
-
-    <p>The line is left-aligned
-      (despite the containing block having ''direction: rtl'')
-      because the containing block (the <code>&lt;para></code>) has ''unicode-bidi:plaintext'',
-      and the line box belongs to a bidi paragraph that is LTR.
-      This is because that paragraph's first character with a strong direction
-      is the LTR "h" from "he". The RTL "שלום!" does precede the "he",
-      but it sits in its own bidi-isolated paragraph that is <em>not</em>
-      immediately contained by the <code>&lt;para&gt;</code>,
-      and is thus irrelevant to the line box's alignment.
-      From from the standpoint of the bidi paragraph immediately contained
-      by the <code>&lt;para&gt;</code> containing block,
-      the <code>&lt;quote&gt;</code>&rsquo;s bidi-isolated paragraph inside it is,
-      by definition, just a neutral U+FFFC character,
-      so the immediately-contained paragraph becomes LTR by virtue
-      of the "he" following it.
   </div>
 
   <div class="example">
     <pre>
-      &lt;fieldset style="direction: rtl">
-      &lt;textarea style="unicode-bidi:plaintext">
+      &lt;textarea style="direction: rtl; unicode-bidi:plaintext">
 
       Hello!
 
       &lt;/textarea>
-      &lt;/fieldset></pre>
-
-    <p>As expected, the "Hello!" should be displayed LTR
-      (i.e. with the exclamation mark on the right end,
-      despite the <code>&lt;textarea></code>’s ''direction:rtl'')
-      and left-aligned.
-      This makes the empty line following it left-aligned as well,
-      which means that the caret on that line should appear at its
-      left edge. The first empty line, on the other hand, should
-      be right-aligned, due to the RTL direction of its containing
-      paragraph, the <code>&lt;textarea></code>.
+    </pre>
+
+    <p>Because of ''unicode-bidi: plaintext'',
+      the “Hello!” is typeset LTR
+      (i.e. with the exclamation mark on the right side)
+      and left-aligned,
+      ignoring the containing block’s RTL 'direction'.
+      This makes the empty line following it LTR as well,
+      which means that a caret on that line should appear at its left edge.
+      The empty first line, however, is right-aligned:
+      having no preceding line,
+      it assumes the RTL direction of its containing block.
   </div>
 
 <h2 class="no-num" id="order">Appendix A: