Minor tweaks to intro

Author: fantasai

css3-writing-modes/Overview.html

@@ -245,15 +245,14 @@ <h3 id=vertical-intro><span class=secno>1.1. </span>Introduction to
    vertically. The Japanese example below shows the same text laid out
    horizontally and vertically. In the horizontal case, text is read from
    left to right, top to bottom. For the vertical case, the text is read top
-   to bottom, with the lines ordered either right to left (for Chinese and
-   Japanese) or left to right (for Mongolian and Manchu). Indentation from
-   the left edge in the left-to-right horizontal case translates to
-   indentation from the top edge in the top-to-bottom vertical case.
+   to bottom, right to left. Indentation from the left edge in the
+   left-to-right horizontal case translates to indentation from the top edge
+   in the top-to-bottom vertical case.
 
   <p>The change from horizontal to vertical writing can affect not just the
    layout, but also the typesetting. For example, the position of punctuation
-   mark within its spacing box box also changes from the horizontal to the
-   vertical case:
+   mark within its spacing box may change from the horizontal to the vertical
+   case:
 
   <div class=figure>
    <p><img alt="A comparison of horizontal and vertical Japanese shows that

css3-writing-modes/Overview.src.html

@@ -87,15 +87,14 @@ <h3 id="vertical-intro">Introduction to Vertical Text</h3>
     vertically.  The Japanese example below shows the same text laid out
     horizontally and vertically. In the horizontal case, text is read
     from left to right, top to bottom. For the vertical case, the text is
-    read top to bottom, with the lines ordered either right to left (for
-    Chinese and Japanese) or left to right (for Mongolian and Manchu).
+    read top to bottom, right to left.
     Indentation from the left edge in the left-to-right horizontal case
     translates to indentation from the top edge in the top-to-bottom vertical
     case.
 
   <p>The change from horizontal to vertical writing can affect not just the
     layout, but also the typesetting. For example, the position of punctuation
-    mark within its spacing box box also changes from the horizontal to the
+    mark within its spacing box may change from the horizontal to the
     vertical case:
 
   <div class="figure">