[css-color] Remove forgiveness in 4, custom-only in 5. Fix #7136

Author: svgeesus

css-color-4/Overview.bs

@@ -3875,16 +3875,6 @@ Predefined Color Spaces</h2>
 		are gamut mapped to the valid range at computed value time,
 		with a relative colorimetric intent.
 
-		If more <<number>>s or <<percentage>>s are provided than parameters that the color space takes,
-		the excess <<number>>s at the end are ignored.
-		The color is still a [=valid color=].
-
-		If fewer <<number>>s or <<percentage>>s are provided than parameters that the color space takes,
-		the missing parameters default to ''0''.
-		(This is particularly convenient for multichannel printers
-		where the additional inks are spot colors or varnishes
-		that most colors on the page won't use.)
-		The color is still a [=valid color=].
 
 	* An optional slash-separated <<alpha-value>>.
 		This is interpreted the same way as the <<alpha-value>> in ''rgb()'',

css-color-5/Overview.bs

@@ -1537,25 +1537,25 @@ the allowed [=channel keywords=] are:
 		This is because ICC profiles typically do not accept
 		out of range input values.
 
-		For predefined color spaces,
-		specified component values
-		less than 0 or 0%, or greater than 1 or 100%
-		are not invalid;
-		these out of gamut colors
-		are gamut mapped to the valid range at computed value time,
-		with a relative colorimetric intent.
-
-		If more <<number>>s or <<percentage>>s are provided than parameters that the color space takes,
+		For custom color spaces, if more <<number>>s or <<percentage>>s are provided than parameters that the color space takes,
 		the excess <<number>>s at the end are ignored.
 		The color is still a [=valid color=].
 
-		If fewer <<number>>s or <<percentage>>s are provided than parameters that the color space takes,
+		For custom color spaces, if fewer <<number>>s or <<percentage>>s are provided than parameters that the color space takes,
 		the missing parameters default to ''0''.
 		(This is particularly convenient for multichannel printers
 		where the additional inks are spot colors or varnishes
 		that most colors on the page won't use.)
 		The color is still a [=valid color=].
 
+		For predefined color spaces,
+		specified component values
+		less than 0 or 0%, or greater than 1 or 100%
+		are not invalid;
+		these out of gamut colors
+		are gamut mapped to the valid range at computed value time,
+		with a relative colorimetric intent.
+
 	* An optional slash-separated <<alpha-value>>.
 		This is interpreted the same way as the <<alpha-value>> in ''rgb()'',
 		and if omitted it defaults to ''100%''.