[css-color-4][editorial] Clarity improvements for tagged and untagged images.

Author: svgeesus

css-color-4/Overview.bs

@@ -788,8 +788,6 @@ Transparency: the 'opacity' property</h3>
 		apng/fDAT-inherits-cICP.html
 	</wpt>
 
-	If the color profile or other identifying information is invalid, the image is treated as [=untagged images=]
-
 	For example, when a browser running on a system with a Display P3 monitor
 	displays an JPEG image
 	tagged as being in the ITU Rec BT.2020 [[!Rec.2020]]
@@ -799,6 +797,8 @@ Transparency: the 'opacity' property</h3>
 	It must not treat the ITU Rec BT.2020 values
 	as if they were Display P3 values, which would produce incorrect colors.
 
+	If the color profile or other identifying information is invalid, the image is treated as described for [=untagged images=].
+
 <!--
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 ██     ██ ███   ██    ██      ██ ██   ██    ██  ██    ██  ██       ██     ██
@@ -812,7 +812,7 @@ Transparency: the 'opacity' property</h3>
 <h3 id='untagged'>
 Color Spaces of Untagged Colors</h3>
 
-	Colors specified in HTML,
+	For compatibility, colors specified in HTML,
 	and [=untagged images=] must be treated
 	as being in the sRGB color space ([[!SRGB]])
 	unless otherwise specified.
@@ -823,7 +823,7 @@ Color Spaces of Untagged Colors</h3>
 
 	An <dfn export>untagged image</dfn> is an image that is not explicitly assigned a color profile, as defined by the image format.
 
-	Note that this rule does not apply to untagged videos, since
+	This rule does not apply to untagged videos, since
 	<dfn export>untagged video</dfn> should be presumed to be in an ITU-defined color space.
 	* At below 720p, it is Recommendation ITU-R BT.601 [[!ITU-R-BT.601]]
 	* At 720p, it is SMPTE ST 296 (same colorimetry as 709) [[!SMPTE296]]