[css-text-4] hyphenate-character does not change the position of the "hyphen"

See #2975

Author: frivoal

css-text-4/Overview.bs

@@ -5448,7 +5448,11 @@ Hyphens: the 'hyphenate-character' property</h4>
 		<dt><dfn><<string>></dfn>
 		<dd>
 			Specifies the string that appears
-			at the end of the line before a hyphenation break.
+			at the hyphenation break when hyphenating.
+			(The position of this string is not affected:
+			the UA must insert the string
+			according to the typographic conventions of the [=content language=],
+			defaulting to immediately before the hyphenation break.)
 			The UA <em>may</em> truncate the <a>used value</a>
 			to a limited number of <a>typographic character units</a>;
 			it must not truncate only part of a <a>typographic character unit</a>.