[css-ruby] Interaction between ruby overhang and text-spacing-trim

Author: frivoal

css-ruby-1/Overview.bs

@@ -1862,11 +1862,14 @@ Overhanging Ruby: the 'ruby-overhang' property</h3>
 			* [=preserved white space=]
 			* [=other space separators=]
 			* half of the [=advance measure=] of [=fullwidth opening punctuation=],
-				on the [=inline-start=] side of the character
+				on the [=inline-start=] side of the character,
+				unless it has been trimmed by 'text-spacing-trim'
 			* half of the [=advance measure=] of [=fullwidth closing punctuation=],
-				on the [=inline-end=] side of the character
+				on the [=inline-end=] side of the character,
+				unless it has been trimmed by 'text-spacing-trim'
 			* one quarter of the [=advance measure=] of [=fullwidth middle dot punctuation=],
-				on both the [=inline-start=] and [=inline-end=] sides of the character
+				on both the [=inline-start=] and [=inline-end=] sides of the character,
+				unless it has been trimmed by 'text-spacing-trim'
 	</dl>
 
 	When [=ruby annotations=] are not allowed to overhang,