[css-text-3] Fix example text. #5758

Author: fantasai

css-text-3/Overview.bs

@@ -5685,17 +5685,19 @@ Bidirectionality and Line Boxes</h3>
     then from the 'direction' property of the containing block.
 
   <div class="example">
-    <p>In the following example, assuming the <code>&lt;block&gt;</code>
-    is a preformatted block (''display: block; white-space: pre'') inheriting
-    ''text-align: start'', every other line is right-aligned:</p>
-    <pre>
+    <p>In the following example,
+    assuming the <code>&lt;block&gt;</code>
+    is a start-aligned preformatted block
+    (''display: block; white-space: pre; text-align: start''),
+    every other line is right-aligned:
+    <pre dir=auto>
       &lt;block style="unicode-bidi: plaintext"&gt;
-        Latin
-        &#x0648;·&#x06A9;&#x0645;&#x06CC;
-        Latin
-        &#x0648;·&#x06A9;&#x0645;&#x06CC;
-        Latin
-        &#x0648;·&#x06A9;&#x0645;&#x06CC;
+        français
+        فارسی
+        français
+        فارسی
+        français
+        فارسی
       &lt;/block&gt;</pre>
   </div>