[css-text-3] atomic inlines are surrounded by soft wrap opportunities

Part of #4576

Author: frivoal

css-text-3/Overview.bs

@@ -2363,11 +2363,11 @@ Line Breaking Details</h3>
         line-breaking/line-breaking-019.html
       </wpt>
 
-    <li>The line breaking behavior of a replaced element or other atomic inline
-      is equivalent to an ideographic character
-      (Unicode linebreaking class <code>ID</code> [[!UAX14]]),
-      and additionally, for Web-compatibility, introduces a <a>soft wrap opportunity</a>
-      between itself and any adjacent U+00A0 NO-BREAK SPACE character.
+    <li>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,
+      such as U+00A0 NO-BREAK SPACE.
 
       <wpt>
       line-breaking/line-breaking-atomic-001.html
@@ -2378,11 +2378,13 @@ Line Breaking Details</h3>
       line-breaking/line-breaking-atomic-006.html
       line-breaking/line-breaking-atomic-007.html
       line-breaking/line-breaking-atomic-008.html
+      line-breaking/line-breaking-atomic-009.html
       line-breaking/line-breaking-replaced-001.html
       line-breaking/line-breaking-replaced-002.html
       line-breaking/line-breaking-replaced-003.html
       line-breaking/line-breaking-replaced-004.html
       line-breaking/line-breaking-replaced-005.html
+      line-breaking/line-breaking-replaced-006.html
       line-breaking/line-breaking-atomic-nowrap-001.html
       </wpt>