[css-nav-1] Unify how we link between IDL and the corresponding <dfn>

Author: frivoal

css-nav-1/Overview.bs

@@ -427,10 +427,11 @@ partial interface Window {
 </pre>
 
 <div algorithm="windowNavigate steps">
-The {{Window/navigate()}} method must follow these steps:
+When the <dfn method for="Window" lt="navigate(dir)">navigate(dir)</dfn> method is called,
+the User Agent must run the following step:
 
-If <var>dir</var> is <code>"up"</code>, <code>"down"</code>, <code>"left"</code>, or <code>"right"</code>,
-run the <a>spatial navigation steps</a> in direction <var>dir</var>.
+* If <var>dir</var> is <code>"up"</code>, <code>"down"</code>, <code>"left"</code>, or <code>"right"</code>,
+    run the <a>spatial navigation steps</a> in direction <var>dir</var>.
 
 Issue(3387): The name of this API is under discussion
 
@@ -475,7 +476,7 @@ When these methods are called,
 the User Agent must run the steps described below:
 
 <div algorithm="getSpatialNavigationContainer steps">
-:   <dfn method for=Element lt="getSpatialNavigationContainer()">{{Element/getSpatialNavigationContainer()}}</dfn>
+:   <dfn method for=Element lt="getSpatialNavigationContainer()">getSpatialNavigationContainer()</dfn>
 ::
     1. Return the element if it is a <a>spatial navigation container</a>,
         or the nearest ancestor of the element that is a <a>spatial navigation container</a>,