[css-images] Fix some lingering pre-bikeshed <<foo>> stuff.

Author: tabatkins

css-images/Overview.bs

@@ -1555,8 +1555,8 @@ Conic Gradients: the ''conic-gradient()'' notation</h3>
 	A conic gradient is specified by indicating the center of the gradient,
 	and then specifying a list of color-stops.
 	Unlike linear and radial gradients,
-	whose color-stops are placed by specifying a <code>&lt;length></code>,
-	the color-stops of a conic gradient are specified with an <code>&lt;angle></code>.
+	whose color-stops are placed by specifying a <<length>>,
+	the color-stops of a conic gradient are specified with an <<angle>>.
 	Rays are then drawn emerging from the center and pointing in all directions,
 	with the color of each ray equal to the color of the gradient-line where they intersect it.
 
@@ -1782,10 +1782,10 @@ Gradient Color-Stops</h3>
 			<<cap-linear-color-stop>> , [ <<linear-color-stop>># , ]? <<cap-linear-color-stop>>
 		<dfn>&lt;cap-linear-color-stop></dfn> = <<color>> &amp;&amp; <<color-stop-length>>?
 		<dfn>&lt;linear-color-stop></dfn> = <<color>> || <<color-stop-length>>
-		<dfn>&lt;color-stop-length></dfn> = [ <var title=''>&lt;length>> | <<percentage>> ]{1,2}
+		<dfn>&lt;color-stop-length></dfn> = [ <<length>> | <<percentage>> ]{1,2}
 
 		<dfn>&lt;angular-color-stop-list></dfn> =
-			<<cap-angular-color-stop>> , [ <<angular-color-stop>># , ]? <<cap-angular-color-stop>>
+			<<cap-angular-color-stop>> , [ <<angular-color-stop>># , ]? <<cap-angular-color-stop>>H
 		<dfn>&lt;cap-angular-color-stop></dfn> = <<color>> &amp;&amp; <<color-stop-angle>>?
 		<dfn>&lt;angular-color-stop></dfn> = <<color>> || <<color-stop-angle>>
 		<dfn>&lt;color-stop-angle></dfn> = [ <<angle>> | <<percentage>> ]{1,2}
@@ -2661,7 +2661,7 @@ Orienting an Image on the Page: the 'image-orientation' property</h3>
 			If the image has an orientation specified in its metadata,
 			such as EXIF,
 			this value computes to the angle that the metadata specifies is necessary to correctly orient the image.
-			If necessary, this angle is then rounded and normalized as described above for an <code>&lt;angle></code> value.
+			If necessary, this angle is then rounded and normalized as described above for an <<angle>> value.
 			If there is no orientation specified in its metadata,
 			this value computes to ''0deg''.
 
@@ -2828,7 +2828,7 @@ Interpolating <<image>></h3>
 
 	In specific terms,
 	at each point in the interpolation
-	the image is equal to <code>cross-fade( (100% - t) &lt;start image>, &lt;end image>)</code>.
+	the image is equal to <code>cross-fade( (100% - t) <var>start image</var>, <var>end image</var>)</code>.
 
 	<p class='issue'>
 		Special-case interpolating to/from no image,