[css-text-decor-4] Renamed text-decoration-trim to text-decoration-inset (#13039)

`text-decoration-trim` got renamed to `text-decoration-inset` and any mentions of `text-decoration-skip-inset` were either removed or replaced by `text-decoration-inset`.

Author: SebastianZ

css-text-decor-4/Overview.bs

@@ -859,11 +859,11 @@ Text Decoration Line Uniformity</h3>
 	</div>
 
 
-<h4 id="text-decoration-skip-inset-property">
-Text Decoration Line Trimming and Extension: the 'text-decoration-trim' property</h4>
+<h4 id="text-decoration-inset-property">
+Trimming, Expanding, and Shifting Text Decoration Lines: the 'text-decoration-inset' property</h4>
 
 	<pre class="propdef">
-	Name: text-decoration-trim
+	Name: text-decoration-inset
 	Value: <<length>>{1,2} | auto
 	Initial: 0
 	Applies to: all elements
@@ -873,59 +873,61 @@ Text Decoration Line Trimming and Extension: the 'text-decoration-trim' property
 	Animation type: by computed value
 	</pre>
 
-	This property adjusts the start and end points of line decorations,
-	allowing the author to shorten, lengthen, or shift the decoration
-	with respect to the text.
+	This property adjusts the start and end endpoints of line decorations.
+	Positive values move an endpoint inward, trimming the decoration;
+	negative values move it outward, extending the decoration.
+
 	It controls all text decoration lines drawn by this [=decorating box=],
 	but not any text decoration lines drawn by its ancestors.
 	If two component values are given,
 	the first applies to the [=start=] and the second to the [=end=].
 	Values have the following meanings:
 
-	<dl dfn-type=value dfn-for=text-decoration-skip-inset>
+	<dl dfn-type=value dfn-for=text-decoration-inset>
 		<dt><dfn><<length>></dfn></dt>
 		<dd>
-			Inset (positive) or outset (negative)
-			the start/end of the affected line decorations.
+			Adjusts the start or end endpoint of the affected line decorations.
+			Positive values move the endpoint inward (trimming),
+			negative values move it outward (extending).
 
 			<div class="example">
 				<p>The following example offsets an extra thick underline
 				1em endwards with respect to the text
 				<pre>
 					h1 {
 						text-decoration: underline 0.3em rgba(36,148,187,0.25);
-						text-decoration-trim: 1em -1em;
+						text-decoration-inset: 1em -1em;
 					}
 				</pre>
 			</div>
 
 		<dt><dfn>auto</dfn></dt>
 		<dd>
-			The UA chooses a trim amount that ensures that
+			The UA chooses an inset amount that ensures that
 			if two identical underlined elements appear side-by-side
 			they do not appear to have a single underline.
 			(This is important in Chinese, where underlining is a form of punctuation.)
 
 			<div class="figure">
-				<p><img title="text-decoration-skip-inset: auto"
+				<p><img title="text-decoration-inset: auto"
 				        alt="An underline below a series of Chinese characters has a gap between two adjacent underlining elements."
 				        src="images/decoration-skip-inset.png"
 				        width="223"
 				        height="77">
-				<p class="caption">''text-decoration-skip-inset: auto'' for <code>&lt;u>石井&lt;/u>&lt;u>艾俐俐&lt;/u></code>
+				<p class="caption">''text-decoration-inset: auto'' for <code>&lt;u>石井&lt;/u>&lt;u>艾俐俐&lt;/u></code>
 </p>
 			</div>
 	</dl>
 
-	Text decoration trimming is subject to 'box-decoration-break':
+	The adjustment of the text decoration's endpoints is subject to 'box-decoration-break':
 	* for ''box-decoration-break/slice'' (the default)
-		trimming is only applied to the [=start=] edge of the first fragment
+		endpoint adjustment is only applied to the [=start=] edge of the first fragment
 		and the [=end=] edge of the last fragment,
-		and may accumulate to other fragments if the amount of the trim
+		and may accumulate to other fragments if the amount of the inset
 		is more than the length of the fragment.
 		<!-- Percentages are relative to the total length of the [=decorating box=]. -->
 	* for ''box-decoration-break/clone''
-		trimming is applied to each fragment independently.
+		endpoint adjustment is applied to each fragment independently.
 		<!-- and percentages are relative to the length of that fragment individually -->
 
 <h3 id="text-decoration-skipping">
@@ -952,7 +954,6 @@ Text Decoration Line Continuity: the 'text-decoration-skip' shorthand and its su
 	The 'text-decoration-skip' property and its sub-properties
 	('text-decoration-skip-self',
 	'text-decoration-skip-box',
-	'text-decoration-skip-inset',
 	'text-decoration-skip-spaces',
 	'text-decoration-skip-ink')
 	control interruptions in line decorations
@@ -2185,7 +2186,7 @@ Changes since the 4 May 2022 Working Draft</h3>
 	<ul>
 		<li>Redesigned 'text-decoration-skip-self'.
 			(<a href="https://github.com/w3c/csswg-drafts/issues/2885">Issue 2885</a>)
-		<li>Replaced <css>text-decoration-skip-edges</css> with 'text-decoration-trim'.
+		<li>Replaced <css>text-decoration-skip-edges</css> with 'text-decoration-inset'.
 			(<a href="https://github.com/w3c/csswg-drafts/issues/4557">Issue 4557</a>)
 		<li>Redefined [=spacers=] for 'text-decoration-skip-spaces' to reference [=Unicode General Category=] <code>Zs</code>
 			and to only additionally include word separators when skipping all spaces.