[css-color-5] RCS modern hsl & hsla syntax, w3c#8231

Author: svgeesus

css-color-5/Overview.bs

@@ -1083,12 +1083,12 @@ Relative sRGB color syntax is <em>only</em> applicable to the non-legacy RGB syn
 The grammar of the [=modern color syntax=] ''hsl()'' and ''hsla()'' functions is extended as follows:
 
 <pre class='prod'>
-<dfn>hsl()</dfn> = hsl([from <<color>>]?
+<dfn><<modern-hsl-syntax>></dfn> = hsl([from <<color>>]?
 				  [<<hue>> | none]
 				  [<<percentage>> | <<number>> | none]
 				  [<<percentage>> | <<number>> | none]
 				  [ / [<<alpha-value>> | none] ]? )
-<dfn>hsla()</dfn> = hsla([from <<color>>]?
+<dfn><<modern-hsla-syntax>></dfn> = hsla([from <<color>>]?
 				[<<hue>> | none]
 				[<<percentage>> | <<number>> | none]
 				[<<percentage>> | <<number>> | none]