[css-text-4] Reorder white-space-trim values, add line-breaking note

Author: fantasai

css-text-4/Overview.bs

@@ -2574,7 +2574,7 @@ White Space Trimming: the 'white-space-trim' property</h3>
 
 	<pre class="propdef">
 	Name: white-space-trim
-	Value: none | discard-inner || discard-before || discard-after
+	Value: none | discard-before || discard-after || discard-inner
 	Initial: none
 	Applies to: [=inline boxes=] and [=block containers=]
 	Inherited: no
@@ -2588,6 +2588,16 @@ White Space Trimming: the 'white-space-trim' property</h3>
 	Values have the following meanings:
 
 	<dl dfn-for=white-space-trim dfn-type=value>
+		<dt><dfn>discard-before</dfn>
+		<dd>
+			This value directs the UA to collapse all collapsible whitespace
+			immediately before the start of the element.
+
+		<dt><dfn>discard-after</dfn>
+		<dd>
+			This value directs the UA to collapse all collapsible whitespace
+			immediately after the end of the element.
+
 		<dt><dfn>discard-inner</dfn>
 		<dd>
 			For block containers this value directs UAs to discard
@@ -2597,17 +2607,11 @@ White Space Trimming: the 'white-space-trim' property</h3>
 			starting with the first <a>segment break</a> after the last non-white-space character in the element.
 			For other elements this value directs UAs to discard
 			all whitespace at the beginning and end of the element.
+	</dl>
 
-		<dt><dfn>discard-before</dfn>
-		<dd>
-			This value directs the UA to collapse all collapsible whitespace
-			immediately before the start of the element.
 
-		<dt><dfn>discard-after</dfn>
-		<dd>
-			This value directs the UA to collapse all collapsible whitespace
-			immediately after the end of the element.
-	</dl>
+	Note: Discarding [=document white space=] using 'white-space-trim'
+	can change where [=line breaking opportunities=] occur in the text.
 
 	<div class="example">
 		<p>The following style rules render DT elements as a comma-separated list: