banner for dart and image fix

public/_includes/_banner.jade

@@ -1,4 +1,6 @@
-content = banner ? banner : intro
-
-.banner
-    p.text-body !{content}
+if banner
+  .banner
+    p.text-body !{banner}
+else if intro
+  .banner
+    p.text-body !{intro}

public/docs/dart/latest/guide/_data.json

@@ -1,5 +1,6 @@
 {
   "_listtype": "ordered",
+
   "setup": {
     "title": "Getting Started"
   },
@@ -9,8 +10,10 @@
   },
 
   "displaying-data": {
-    "title": "Displaying Data"
+    "title": "Displaying Data",
+    "intro": "Displaying data is job number one for any good application. In Angular, you bind data to elements in HTML templates, and Angular automatically updates the UI as data changes."
   },
+
   "user-input": {
     "title": "User Input"
   },

public/docs/dart/latest/guide/_layout.jade

@@ -7,9 +7,7 @@ html(lang="en" ng-app="angularIOApp")
     != partial("../../../../_includes/_main-nav")
     != partial("../../../../_includes/_docs-nav")
     != partial("../../../../_includes/_hero")
-
-    if banner
-      != partial("../../../../_includes/_banner")
+    != partial("../../../../_includes/_banner")
 
     article.l-content-small.grid-fluid.docs-content(ng-non-bindable)
       != yield

public/docs/dart/latest/guide/displaying-data.jade

@@ -1,14 +1,9 @@
 .l-main-section
-  p.
-      Displaying data is job number one for any good application.
-      In Angular, you bind data to elements in HTML
-      templates, and Angular automatically updates the UI as data changes.
   p.
       Let's walk through how to display a property and a list of properties,
       and then to conditionally show content
-      based on state.
-  p.
-      The final UI looks like this:
+      based on state. The final UI looks like this:
+
   figure.image-display
     img(src='displaying-data-example1.png')
 

public/docs/js/latest/guide/_layout.jade

@@ -7,8 +7,7 @@ html(lang="en" ng-app="angularIOApp")
     != partial("../../../../_includes/_main-nav")
     != partial("../../../../_includes/_docs-nav")
     != partial("../../../../_includes/_hero")
-    if intro || banner
-      != partial("../../../../_includes/_banner")
+    != partial("../../../../_includes/_banner")
 
     article.l-content-small.grid-fluid.docs-content(ng-non-bindable)
       != yield