[css-ui-3] Backport fix

Backport
09f11f2#diff-cc2f666bf7d93dcefcc3fffc4761793a54fba00c03b53b9dbdf81f5056f0b56e,
and mark as candidate correction, as discussed in
#6900 (comment).

The resolution for the original didn't limit it to level 4 anyway.

Author: frivoal

css-ui-3/Overview.bs

@@ -410,14 +410,24 @@ translucent-outline.html
 	for consistency with other border-like things.
 </div>
 
+<div class="candidate correction" id=c4>
+	<span class=marker>Candidate Correction 4:</span>
+	Remove the special-case
+	where 'outline-width' computes to 0
+	based on ''outline-style: none'',
+	keeping things consistent with
+	<span class=informative>a similar change being applied to 'column-rule-width' and 'border-width'</span>.
+	(See <a href="https://github.com/w3c/csswg-drafts/issues/11494">Issue 11494</a>.)
+</div>
+
 <pre class="propdef">
 Name: outline-width
 Value: <<line-width>>
 Initial: medium
 Applies to: all elements
 Inherited: no
 Percentages: N/A
-Computed value: absolute length<ins cite=#c2>, [=snapped as a border width=]</ins>; ''0'' if the outline style is ''border-style/none''.
+Computed value: absolute length<ins cite=#c2>, [=snapped as a border width=]</ins><del cite=#c4 title="Candidate Correction 4">; ''0'' if the outline style is ''border-style/none''.</del>
 Animation type: <del cite=#c3 title="Proposed correction 3"><a href="https://drafts.csswg.org/css3-transitions/#animtype-length">length</a></del><ins cite=#c3 title="Proposed correction 3">by computed value</ins>
 </pre>
 
@@ -1819,6 +1829,7 @@ Changes from the <a href="https://www.w3.org/TR/2018/REC-css-ui-3-20180621/">21
 	<li><a href=#c1>Proposed Correction 1:</a> Referred to <a>scroll containers</a> instead of 'overflow' values other than ''overflow/visible'', so ''overflow/clip'' is included.
 	<li><a href=#c2>Proposed Correction 2:</a> Let computed value of 'outline-width' be [=snapped as a border width=].
 	<li><a href=#c3>Proposed Correction 3:</a> Updated and clarified computed value and animation type definitions.
+	<li><a href=#c4>Candidate Correction 4:</a> Removed the special case of 'outline-width' having a computed value of 0 based on ''outline-style: none''.
 	<li>Update to modern terminology for consistency with other specifications, replacing relevant uses of terms \'intrinsic width/height/aspect ratio/size\' to \'natural\'.
 	<li>Removed "Media" entries from property definitions. Its meaning has never been defined properly, and it does not add useful information.
 	<li>Added <a href="#values">Value Definitions</a> section, for consistency with other CSS specifications.