[css-images-4] weird typo

Author: tabatkins

css-images-4/Overview.bs

@@ -1107,7 +1107,7 @@ Conic Gradients: the ''conic-gradient()'' notation</h3>
 		<div style="overflow: hidden">
 			<img style="float: right; margin-left: 1em;" src='images/conic-diagram.png' alt="[An image showing a box with a background shading gradually clockwise from white to black, starting from the top. A gradient circle is shown, and the colors at 0 and 216 degrees respectively.]">
 
-			This example visually illustrates how ''conic-gradient(at 25% 30%, white, black 60%)'' would be drawn. Note that since color stop positions always resolve to angles, the only effect of the center center is a 2D translation of the gradient, i.e. it does not affect how the gradient is drawn.
+			This example visually illustrates how ''conic-gradient(at 25% 30%, white, black 60%)'' would be drawn. Note that since color stop positions always resolve to angles, the only effect of the ''at 25% 30%'' is a 2D translation of the gradient, i.e. it does not affect how the gradient is drawn.
 		</div>
 	</div>