Cleanup post review

Author: schenney-chromium

mediaqueries-5/Overview.bs

@@ -3700,14 +3700,15 @@ Appendix B: Privacy Considerations</h2>
 	* The {{prefers-reduced-motion}}, {{prefers-color-scheme}}, {{prefers-reduced-transparency}},
 	  {{forced-colors}} and {{inverted-colors}} queries reflect affordances for a range of special needs.
 
-	Properties dependent on one of the above media queries
-	may be accessed by script using several methods:
+	Properties dependent on one of the above media queries may be accessed by script:
 
-	* Colors and other property values may be directly accessed through computed style.
+	* Colors and other property values may be directly accessed through computed style,
+	  though user agents may elect to return constants for some colors
+	  (see, for example, <a href="https://drafts.csswg.org/css-color-4/#css-system-colors">CSS Color 4</a>).
 	* Layout affecting properties (such as font size) influence lengths, positions and sizes available to script.
 
-	UAs may disable these media features when users have expressed sensitivity to tracking.
-	Alternatively, UAs may limit the combination of features within a single page
+	User agents may disable these media features when users have expressed sensitivity to tracking.
+	Alternatively, user agents may limit the combination of features within a single page
 	to reduce the fingerprinting power of the page.
 
 	The {{PreferenceManager}} object allows querying some user-preference [=media features=]. This