[css-flexbox] Be a little clearer in author conformance criterium.

--HG--
extra : rebase_source : e4c99898f8759135b0a301f0bb279f23a3f14b64

Author: fantasai

css-flexbox/Overview.bs

@@ -944,7 +944,8 @@ Ordering and Orientation</h2>
 		that use this dichotomy to improve accessibility.
 
 	<p>
-		Authors <em>must not</em> use these techniques as a substitute for correct source ordering,
+		Authors <em>must not</em> use 'order' or the ''*-reverse'' values of 'flex-flow'/'flex-direction'
+		as a substitute for correct source ordering,
 		as that can ruin the accessibility of the document.
 
 <!--
@@ -1008,7 +1009,7 @@ Flex Flow Direction: the 'flex-direction' property</h3>
 	</dl>
 
 	<p class="note">
-		The reverse values do not reverse box ordering;
+		The reverse values do not reverse box ordering:
 		like 'writing-mode' and 'direction' [[CSS3-WRITING-MODES]],
 		they only change the direction of flow.
 		Painting order, speech order, and sequential navigation orders