docs(cookbook/graphql): fix jade errors

Author: Urigo

public/docs/ts/latest/cookbook/graphql.jade

@@ -381,7 +381,7 @@ code-example(language="sh" class="code-shell").
 .l-main-section
 <a id="example"></a>
 :marked
-  ## Full Example  
+  ## Full Example
 
 block file-summary
   +makeTabs(
@@ -410,12 +410,12 @@ block file-summary
    `heroes-graphql/ts/app/app-routing.module.ts,
     heroes-graphql/ts/app/hero-search.component.ts,
     heroes-graphql/ts/app/hero-search.component.html,
-    heroes-graphql/ts/app/hero-search.component.css
+    heroes-graphql/ts/app/hero-search.component.css`,
     null,
    `app-routing.modules.ts,
     hero-search.component.ts,
     hero-search.component.html,
-    hero-search.component.css
+    hero-search.component.css`
   )
 
 :marked