Adds the collection label to a document's data

History.markdown

@@ -15,6 +15,7 @@
   * Add categories, last build datetime, and generator to site template
     feed (#2438)
   * Configurable, replaceable Logger-compliant logger (#2444)
+  * Extract `gist` tag into a separate gem (#2469)
 
 ### Bug Fixes
 

lib/jekyll/document.rb

@@ -206,7 +206,8 @@ def to_liquid
           "content"       => content,
           "path"          => path,
           "relative_path" => relative_path,
-          "url"           => url
+          "url"           => url,
+          "collection"    => collection.label
         }
       else
         data

site/docs/collections.md

@@ -244,6 +244,16 @@ In addition to any YAML front-matter provided in the document's corresponding fi
         </p>
       </td>
     </tr>
+    <tr>
+      <td>
+        <p><code>collection</code></p>
+      </td>
+      <td>
+        <p>
+          The name of the document's collection.
+        </p>
+      </td>
+    </tr>
   </tbody>
 </table>
 </div>

test/test_document.rb

@@ -40,6 +40,10 @@ class TestDocument < Test::Unit::TestCase
       }, @document.data)
     end
 
+    should "output the collection name in the #to_liquid method" do
+      assert_equal @document.to_liquid['collection'], "methods"
+    end
+
   end
 
   context " a document part of a rendered collection" do