diff --git a/css-typed-om/Overview.bs b/css-typed-om/Overview.bs
index 1a5ae54d..89d862c6 100644
--- a/css-typed-om/Overview.bs
+++ b/css-typed-om/Overview.bs
@@ -300,7 +300,7 @@ The <dfn method for=StylePropertyMap>append(DOMString <var>property</var>,
 
     3. If {{StylePropertyMap}}’s [=property model=] contains an entry for |property|,
         return the first value found in that entry.
-    
+
     4. Else, return `null`.
 </div>
 
@@ -2273,7 +2273,7 @@ objects, the {{CSSURLImageValue/url}} attribute contains the URL that references
     when called,
     perform the following steps:
 
-    1. If the |url| passed into the constructor doesn't correctly 
+    1. If the |url| passed into the constructor doesn't correctly
         parse as a <<url>>, throw a {{TypeError}} and exit this algorithm.
     2. Else, return a new {{CSSURLImageValue}}
         with its {{CSSURLImageValue/url}} internal slot
@@ -2877,7 +2877,7 @@ depending on the property they came from:
     3. If 'border-image-slice' does not specify ''100%'' for all sides and omits the ''border-image-slice/fill'' keyword,
         serialize 'border-image-slice' and append it to |values|.
     4. If 'border-image-width' does not specify ''1'' for all sides,
-        append "/ " (U+002F FORWARD SLASH followed by U+0020 SPACE) 
+        append "/ " (U+002F FORWARD SLASH followed by U+0020 SPACE)
         to the result of serializing 'border-image-width' and append it to |values|.
     5. If 'border-image-outset' does not specify ''0'' for all sides:
         1. If the previous 'border-image-width' step did not append anything to |values|,
@@ -2886,7 +2886,7 @@ depending on the property they came from:
             otherwise let |prefix| be <nobr>"/ "</nobr>
             (U+002F FORWARD SLASH followed by U+0020 SPACE)
         2. Append |prefix|
-            to the result of serializing 'border-image-outset' 
+            to the result of serializing 'border-image-outset'
             and append it to |values|.
     6. If 'border-image-repeat' is not ''border-image-repeat/stretch'' in both axises,
         serialize 'border-image-repeat' and append it to |values|.
@@ -2917,6 +2917,10 @@ depending on the property they came from:
         return the result of serializing the <<length>> value.
     3. Otherwise, return the result of serializing the <<percentage>> value.
 
+: 'position'
+::
+    1. Return the serialization of 'position'.
+
 : 'right'
 ::
     1. If the value is the ''auto'' keyword,