[css-text] non-tailorable Unicode line breaking controls other than N…

…BSP take precedence over our rule about atomic inlines

See #8972

css-text-3/Overview.bs

@@ -3376,7 +3376,11 @@ Line Breaking Details</h3>
 			there is a [=soft wrap opportunity=]
 			before and after each replaced element or other [=atomic inline=],
 			even when adjacent to a character that would normally suppress them,
-			such as U+00A0 NO-BREAK SPACE.
+			including U+00A0 NO-BREAK SPACE.
+			However,
+			with the exception of U+00A0 NO-BREAK SPACE,
+			non-tailorable Unicode line breaking rules must be honored.
+			[[UAX14]]
 
 			<wpt>
 			line-breaking/line-breaking-atomic-001.html
@@ -8267,6 +8271,23 @@ Recent Changes</h3>
 			in the source document text and markup.</ins></p>
 		</blockquote>
 
+	* Non-tailorable Unicode line breaking controls other than NBSP
+		take precedence over our rule about atomic inlines.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/8972">Issue 8972</a>)
+		<blockquote>
+			For Web-compatibility
+			there is a [=soft wrap opportunity=]
+			before and after each replaced element or other [=atomic inline=],
+			even when adjacent to a character that would normally suppress them,
+			<del>such as</del><ins>including</ins> U+00A0 NO-BREAK SPACE.
+			<ins>
+			However,
+			with the exception of U+00A0 NO-BREAK SPACE,
+			non-tailorable Unicode line breaking rules must be honored.
+			[[UAX14]]
+			</ins>
+		</blockquote>
+
 	In addition there have been some minor editorial fixes.
 
 <h3 class="no-num" id="old-changes">

css-text-4/Overview.bs

@@ -4235,7 +4235,11 @@ Line Breaking Details</h3>
 			there is a [=soft wrap opportunity=]
 			before and after each replaced element or other [=atomic inline=],
 			even when adjacent to a character that would normally suppress them,
-			such as U+00A0 NO-BREAK SPACE.
+			including U+00A0 NO-BREAK SPACE.
+			However,
+			with the exception of U+00A0 NO-BREAK SPACE,
+			non-tailorable Unicode line breaking rules must be honored.
+			[UAX14]
 
 			<wpt>
 			line-breaking/line-breaking-atomic-001.html
@@ -10420,6 +10424,9 @@ Changes</h2>
 	* Renamed <css>text-space-collapse</css> and <css>text-space-trim</css>
 		to 'white-space-collapse' and 'white-space-trim'.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/8273">Issue 8273</a>)
+	* Non-tailorable Unicode line breaking controls other than NBSP
+		take precedence over our rule about atomic inlines.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/8972">Issue 8972</a>)
 
 	Significant changes since the <a href="https://www.w3.org/TR/2022/WD-css-text-4-20221231/">31 December 2022 Working Draft</a> include:
 	* Redesigned 'text-spacing' by: