[css-writing-modes-3] Make everything undefined. (OK, not everything, just non-CSS2.1 things.) w3c#4231

Author: fantasai

css-writing-modes-3/Overview.bs

@@ -2039,15 +2039,17 @@ Available Space of Orthogonal Flows</h4>
 <h4 id="orthogonal-layout">
 Auto-sizing Orthogonal Flow Roots</h4>
 
-  The [=automatic size=] of an [=orthogonal flow=]
+  The [=automatic inline size=] of a [=block-level=] or [=block container=] [=orthogonal flow=]
   (i.e. the size used when its [=preferred size property=] is ''width/auto'')
-  is calculating as its [=fit-content size=], i.e.
-  <code>min([=max-content size=], max([=min-content size=], [=stretch-fit size=])</code>,
+  is calculating as its [=fit-content size=] in its [=inline axis=], i.e.
+  <code>min([=max-content inline size=], max([=min-content inline size=], [=stretch-fit inline size=])</code>,
   where the [=available space=] is
   either the corresponding size of the [=containing block=] if that is [=definite=],
   or else the [=fallback size=] as defined [[#orthogonal-auto|above]].
 
   The [=automatic sizing=] of orthogonal [=multi-column containers=]
+  (in both axes)
+  and of other [=display types=] not mentioned above
   is undefined in this level;
   see <a href="https://www.w3.org/TR/css-writing-modes-4/#auto-multicol">CSS Writing Modes Level 4</a>.