[css-text-3] Test coverage info

Author: frivoal

css-text-3/Overview.bs

@@ -4334,6 +4334,7 @@ Hyphenation: the 'hyphens' property</h3>
 		* No test of Animation type.
 		* “Automatic hyphenation opportunities within a word must be ignored if the word contains a conditional hyphen (shy or U+00AD), in favor of the conditional hyphen(s)”
 		* “However, if, even after breaking at such opportunities, a portion of that word is still too long to fit on one line, an automatic hyphenation opportunity may be used.”"></wpt>
+		* “The UA must use the appropriate language-specific hyphenation character(s) and should apply any appropriate spelling changes just as for automatic hyphenation at the same point.”
 
 	<dfn id=hyphenate lt="hyphenation|hyphenate">Hyphenation</dfn>
 	is the controlled splitting of words