[css-images-4] Clean up bikeshed errors.

Author: tabatkins

css-images-4/Overview.bs

@@ -1134,7 +1134,7 @@ Conic Gradients: the ''conic-gradient()'' notation</h3>
 
 		<dt><dfn><<position>></dfn>
 		<dd>
-			Determines the <dfn dfn>gradient center</dfn> of the gradient.
+			Determines the <dfn dfn export>gradient center</dfn> of the gradient.
 			The <<position>> value type (which is also used for 'background-position')
 			is defined in [[css-values-3]],
 			and is resolved using the center-point as the object area
@@ -1154,7 +1154,7 @@ Conic Gradients: the ''conic-gradient()'' notation</h3>
 <h4 id='conic-color-stops' class='no-toc'>
 Placing Color Stops</h4>
 
-	Color stops are placed on a <a>gradient line</a> that curves around the center in a circle,
+	Color stops are placed on a <a>gradient line</a> that curves around the <a>gradient center</a> in a circle,
 	with both the 0% and 100% locations at 0deg.
 	Just like linear gradients,
 	0deg points to the top of the page,
@@ -1908,8 +1908,8 @@ Interpolating <<image>> {#interpolating-images}
 	(like some gradients)
 	have their own special interpolation rules.
 	In general terms,
-	images are interpolated by scaling them to the size of the start image
-	and cross-fading the two while they transition to the size of the end image.
+	images are interpolated by scaling them to the size of the <var>start image</var>
+	and cross-fading the two while they transition to the size of the <var>end image</var>.
 
 	In specific terms,
 	at each point in the interpolation
@@ -1986,7 +1986,7 @@ Interpolating <<gradient>> {#interpolating-gradients}
 
 			* Otherwise, the size must be changed to a pair of <<length>>s
 				that would produce an equivalent ending-shape.
-				If the <<ending-shape>> was specified as ''circle'',
+				If the <<ending-shape>> was specified as <a value spec=css-images-3>circle</a>,
 				change it to ''ellipse''.
 
 	2. Interpolate each component and color-stop of the gradients independently.