[css-backgrounds-3][css-multicol-4][css-ui-4][css-gaps-1] Adjust *-width zero value special cases per WG resolution. #11494

Author: kbabbitt

css-backgrounds-3/Overview.bs

@@ -2048,7 +2048,7 @@ Line Thickness: the 'border-width' properties</h3>
 	Inherited: no
 	Logical property group: border-width
 	Percentages: N/A
-	Computed value: absolute length, [=snapped as a border width=]; zero if the border style is ''border-style/none'' or ''hidden''
+	Computed value: absolute length, [=snapped as a border width=]
 	Animation Type: by computed value
 	</pre>
 
@@ -2125,6 +2125,11 @@ Line Thickness: the 'border-width' properties</h3>
 	If there are four values
 	they apply to the top, right, bottom, and left, respectively.
 
+	The [=resolved value=] for the 'border-width' properties is the [=used value=].
+
+	If the 'border-style' corresponding to a given 'border-width' is ''border-style/none'' or ''hidden'',
+	then the [=used value|used=] width is 0.
+
 	Note: Although the [=initial value|initial=] width is ''medium'',
 	the [=initial value|initial=] style is ''border-style/none'';
 	therefore the [=used value|used=] initial width is 0.

css-gaps-1/Overview.bs

@@ -708,7 +708,7 @@ Gap decoration width: The 'column-rule-width' and 'row-rule-width' properties</h
 		Initial: medium
 		Applies to: <a>grid containers</a>, <a>flex containers</a>, <a>multicol containers</a>, and <a>masonry containers</a>
 		Inherited: no
-		Computed value: list of absolute lengths, <a>snapped as a border width</a>, or ''0'' under conditions described below
+		Computed value: list of absolute lengths, <a>snapped as a border width</a>
 		Animation type: by computed value type
 	</pre>
 
@@ -728,13 +728,6 @@ Gap decoration width: The 'column-rule-width' and 'row-rule-width' properties</h
 
 	This property sets the widths of <a>gap decorations</a>. Negative values are not allowed.
 
-	If the computed value of ''column-rule-style'' is ''border-style/none'' or ''border-style/hidden'',
-	then the computed value of ''column-rule-width'' is ''0''.
-	This behavior is for backwards compatibility with [[css-multicol-1#crw]].
-
-	Issue: Should the "force to 0" behavior apply when lists of values are involved?
-	If so, how should this be handled with unaligned lists?
-
 <h3 id="lists-repeat">
 Lists of values and the ''repeat-line-color/repeat()'' notation</h3>
 

css-multicol-1/Overview.bs

@@ -1166,7 +1166,7 @@ Stacking Context</h3>
 	parsing/column-rule-style-invalid.html
 	</wpt>
 
-	The ''border-style/none'' and ''hidden'' values force the computed value of 'column-rule-width' to be ''0''.
+	The ''border-style/none'' and ''hidden'' values force the used value of 'column-rule-width' to be ''0''.
 
 
 <h3 id='crw'>The Width Of Column Rules: the 'column-rule-width' property</h3>
@@ -1178,7 +1178,7 @@ Stacking Context</h3>
 	Applies to: multicol containers
 	Inherited: no
 	Percentages: N/A
-	Computed value: absolute length, [=snapped as a border width=]; ''0'' if the column rule style is ''border-style/none'' or ''hidden''
+	Computed value: absolute length, [=snapped as a border width=]
 	Animation type: by computed value type
 	</pre>
 

css-ui-4/Overview.bs

@@ -379,7 +379,7 @@ Outline Thickness: the 'outline-width' property</h3>
 	Applies to: all elements
 	Inherited: no
 	Percentages: N/A
-	Computed value: absolute length, [=snapped as a border width=]; ''0'' if the outline style is ''border-style/none''.
+	Computed value: absolute length, [=snapped as a border width=]
 	Animation type: by computed value
 	</pre>