[css-values] Editorial: In general, spell '1/0' as 'infinity' in the text, now that that's valid.

Author: tabatkins

css-values-4/Overview.bs

@@ -2964,8 +2964,8 @@ Argument Ranges</h4>
 	(because the JS function's input is in radians,
 	and one cannot perfectly express a value of π/2 in JS numbers),
 	is defined so that roundtripping of values works;
-	''tan(atan(1 / 0))'' yields +∞,
-	''tan(atan(-1 / 0))'' yields −∞,
+	''tan(atan(infinity))'' yields +∞,
+	''tan(atan(-infinity))'' yields −∞,
 	''atan(tan(90deg))'' yields ''90deg'',
 	and ''atan(tan(-90deg))'' yields ''-90deg''.
 
@@ -3583,7 +3583,7 @@ Type Checking</h3>
 		(0⁻)
 		can be produced by a multiplication or division that produces zero
 		with exactly one negative argument
-		(such as ''-5 * 0'' or ''1 / (-1 / 0)''),
+		(such as ''-5 * 0'' or ''1 / (-infinity)''),
 		or by certain argument combinations in the other [=math functions=].
 
 		Note: Note that negative zeros don't escape a [=math function=];