[css-nav-1] Fix link errors

Author: Jihye Hong

css-nav-1/Overview.bs

@@ -27,6 +27,7 @@ spec: html; urlPrefix: https://html.spec.whatwg.org/multipage/;
         type: dfn;
             text: actually disabled; url: #concept-element-disabled
             text: being rendered
+            text: browsing context
             text: control group
             text: currently focused area of a top-level browsing context
             text: DOM anchor
@@ -644,11 +645,11 @@ and the result will be <code>null</code>.</em>
         const outerBtn = container.spatialNavigationSearch('down');
     </code></pre>
 
-    <code>innerBtn</code> is assigned to the element whose {{Element/id}} matches with <code>'button1'</code>
+    <code>innerBtn</code> is assigned to the element whose {{Element/id}} matches with <code>button1</code>
     because the {{SpatialNavigationSearchOptions/inside}} attribute is <code>true</code>.
     But if the author doesn't specify {{SpatialNavigationSearchOptions/inside}} attribute,
     <code>false</code> is given to it by default. 
-    Therefore <code>outerBtn</code> is assigned to the element with {{Element/id}} <code>'button2'</code>
+    Therefore <code>outerBtn</code> is assigned to the element with {{Element/id}} <code>button2</code>
     which is outside of <code>container</code>.
 </div>
 
@@ -1217,7 +1218,7 @@ run the following steps:
                 * left edge is right of the right edge of <var>searchOrigin</var>'s <a>boundary box</a> if <var>dir</var> is {{SpatialNavigationDirection/right}}
             * the item partially overlaps with <var>searchOrigin</var> and
                 its two edges which are orthogonal to <var>dir</var> should be on the navigation direction of the respective ones of <var>searchOrigin</var>.
-        2. For each <var>candidate</var> in <var>candidates</var>,
+        2. For each <var ignore="">candidate</var> in <var>candidates</var>,
             [=find the shortest distance=] between <var>searchOrigin</var>.
         3. Return the item of the <var>candidates</var> set that has the smallest distance.
             If several have the same distance,