[css-color-5] proper pipes, fix w3c#6134

Author: svgeesus

css-color-5/Overview.bs

@@ -575,12 +575,12 @@ Adjusting colors: the ''color-adjust'' function {#coloradjust}
 				  <<srgb-adjuster>> | <<hsl-adjuster>> | <<hwb-adjuster>>
 				| <<xyz-adjuster>> | <<lab-adjuster>> | <<lch-adjuster>>
 			] | alpha ] <<percentage>>?
-		<dfn>&lt;srgb-adjuster></dfn> = red || green || blue
-		<dfn>&lt;hsl-adjuster></dfn> = <<hue-adjuster>> || saturation || lightness
-		<dfn>&lt;hwb-adjuster></dfn> = <<hue-adjuster>> ||  whiteness || blackness
-		<dfn>&lt;xyz-adjuster></dfn> = x || y || z
-		<dfn>&lt;lab-adjuster></dfn> = lightness || a || b
-		<dfn>&lt;lch-adjuster></dfn> = lightness || chroma || <<hue-adjuster>>
+		<dfn>&lt;srgb-adjuster></dfn> = red | green | blue
+		<dfn>&lt;hsl-adjuster></dfn> = <<hue-adjuster>> | saturation | lightness
+		<dfn>&lt;hwb-adjuster></dfn> = <<hue-adjuster>> |  whiteness | blackness
+		<dfn>&lt;xyz-adjuster></dfn> = x | y | z
+		<dfn>&lt;lab-adjuster></dfn> = lightness | a | b
+		<dfn>&lt;lch-adjuster></dfn> = lightness | chroma | <<hue-adjuster>>
 		<dfn>&lt;hue-adjuster></dfn> = hue [shorter | longer | increasing | decreasing | specified ]?
 	</pre>