[css-color-5] color-adjust percentage is mandatory w3c#6140

Author: svgeesus

css-color-5/Overview.bs

@@ -722,7 +722,7 @@ Adjusting colors: the ''color-adjust'' function {#coloradjust}
 		<dfn>&lt;color-adjuster></dfn> = [ [
 				  <<srgb-adjuster>> | <<hsl-adjuster>> | <<hwb-adjuster>>
 				| <<xyz-adjuster>> | <<lab-adjuster>> | <<lch-adjuster>>
-			] | alpha ] <<percentage>>?
+			] | alpha ] <<percentage>>
 		<dfn>&lt;srgb-adjuster></dfn> = red | green | blue
 		<dfn>&lt;hsl-adjuster></dfn> = hue | saturation | lightness
 		<dfn>&lt;hwb-adjuster></dfn> = hue |  whiteness | blackness
@@ -752,8 +752,6 @@ Adjusting colors: the ''color-adjust'' function {#coloradjust}
 	however, adjusting all three channels together is useful
 	and will lighten or darken the color.
 
-	The <<hue-adjuster>> takes optional keywords, to specify the [[css-color-4#hue-interpolation]] algorithm.
-	If no keyword is specified, it is as if ''shorter'' were specified.
 
 	<div class="example">
 		This example produces the adjustment of peru (#CD853F),