[css-text-3] Define that out-of-flow elements (and inline element boundaries) do not split a word for text-transform. w3c#3518

Author: fantasai

css-text-3/Overview.bs

@@ -495,10 +495,13 @@ Text Processing</h3>
     </dl>
 
     <p>For ''capitalize'', what constitutes a “word“ is UA-dependent;
-      [[!UAX29]] is suggested (but not required) for determining such word
-      boundaries. Authors should not expect ''capitalize'' to follow
-      language-specific titlecasing conventions (such as skipping articles
-      in English).
+      [[!UAX29]] is suggested (but not required)
+      for determining such word boundaries.
+      However out-of-flow elements and inline element boundaries
+      must not introduce a 'text-transform' word boundary.
+      Authors should not expect ''capitalize'' to follow
+      language-specific titlecasing conventions
+      (such as skipping articles in English).
 
       <wpt>
         text-transform/text-transform-capitalize-033.html