[cssom-1] for realz w3c#6463

Author: svgeesus

cssom-1/Overview.bs

@@ -39,7 +39,7 @@ urlPrefix: https://html.spec.whatwg.org/multipage/
             text: content-type metadata; url: #content-type
     urlPrefix: urls-and-fetching.html
         type: dfn
-                text: document base url
+            text: document base url
     urlPrefix: rendering.html
         type: dfn
             text: being rendered