[css-writing-modes] Try to clarify some clarifications.

Author: fantasai

css-writing-modes/Overview.bs

@@ -2073,8 +2073,6 @@ Auto-sizing Block Containers in Orthogonal Flows</h4>
     (if multiple columns were used)
     or the <i>max-content block size</i> of the content
     (if only one column was used).
-
-  <p>
     If the UA does not support CSS Multi-column Layout [[!CSS3COL]],
     the UA may instead calculate the box's <i>block size</i> assuming an infinite <i>available block size</i>,
     thus laying out its contents into a single column.
@@ -2085,17 +2083,19 @@ Auto-sizing Block Containers in Orthogonal Flows</h4>
 
   <div class="note" id="orthogonal-shrink-to-fit">
   <p>
-    This section defines that
-    when a child box establishes an orthogonal flow,
-    the used <i>block size</i> of the child is
-    the <i>inline-axis</i> <var>min-content</var> and <var>max-content</var> of the parent.
+    Note that this section requires that
+    when an auto-sized child box establishes an orthogonal flow,
+    the used size of the child
+    is calculated to fit its content;
+    and this resulting content-based size
+    is used as input to the <i>inline-axis</i> <var>min-content</var> and <var>max-content</var> of the parent.
   <p>
     This means that when applying shrink-to-fit formula to a box
-    such as an inline-block or a table-cell,
-    and if its child establishes an orthogonal flow,
+    such as an inline-block, float, or table-cell,
+    if its child establishes an orthogonal flow,
     the calculation dependency must be changed so that
     the sizing phase of the child runs first and
-    its used <i>block size</i> becomes an input to the shrink-to-fit formula of the parent.
+    its used <i>block size</i> becomes an input to the <i>inline-size</i> shrink-to-fit formula of the parent.
   </div>
 
 <h4 id="orthogonal-layout">