[css-round-display] Fix the definition for auto value of offset-position

Author: Jihye Hong

css-round-display/Overview.bs

@@ -415,7 +415,7 @@ Values have the following meanings:
 <dl dfn-for="offset-path">
   <dt><<angle>></dt>
   <dd>
-    The path is a straight line that pass through the center of the containing block and has the degree of the angle as specified in <<angle>> from the Y-axis. The initial position of the path is the center of the containing block and the path ends at the edge of the containing block.
+    The path is a straight line that starts from the current position of the element and has the degree of the angle as specified in <<angle>> from the Y-axis. The path ends at the edge of the containing block.
 
     <p class="note">Note: Defining the path with <<angle>>, the element can be positioned in the polar coordinate system. In polar coordinates, a pole is the reference point and points are described as been a certain distance from it, as also a certain angle from the polar axis. In mathematical theory, the polar axis is commonly defined as the positive direction of the x-axis, but we consider the polar axis as the positive direction of the y-axis position as other CSS specifications usually do. Therefore, when the <<angle>> value of 'offset-path' is 0, the element is positioned on the y-axis. If the <<angle>> value increases in the positive direction from 0, the element moves clockwise. The method to determine a direction using the <<angle>> value for 'offset-path' works the same way in [[!CSS3VAL]], <<angle>> value.</p>
   </dd>
@@ -473,19 +473,7 @@ Values are defined as follows:
  <dl dfn-for="offset-position">
     <dt><var>'auto'</var></dt>
     <dd>
-      Computes differently according to the type of value of 'offset-path': 
-      <dl>
-      <dt><<angle>></dt>
-      <dd>The center of the containing block</dd>
-      <dt><<circle()>>, <<ellipse()>></dt>
-      <dd>The point where a virtual tangent to the circle/ellipse would reach the top vertical position</dd>
-      <dt><<inset()>></dt>
-      <dd>The left top corner of the rectangle</dd>
-      <dt><<polygon()>></dt>
-      <dd>The first coordinate pair of the polygon</dd>
-      <dt><<path()>></dt>
-      <dd>The first "move to" argument in the path string</dd> 
-      </dl>
+    Computes to the current position of the element.
     </dd>
 
     <dt><<position>></dt>