Add #inspect method to views

Author: denisdefreyne

lib/nanoc/base/views/config_view.rb

@@ -41,5 +41,9 @@ def [](key)
     def each(&block)
       @config.each(&block)
     end
+
+    def inspect
+      "<#{self.class}>"
+    end
   end
 end

lib/nanoc/base/views/mixins/document_view_mixin.rb

@@ -76,5 +76,9 @@ def reference
     def raw_content
       unwrap.content.string
     end
+
+    def inspect
+      "<#{self.class} identifier=#{unwrap.identifier}>"
+    end
   end
 end