Merge pull request 'added param' (#5) from dev into master

Reviewed-on: #5

apps/blog/admin.py

@@ -85,7 +85,7 @@ class FriendLinkAdmin(admin.ModelAdmin):
 class AboutBlogAdmin(admin.ModelAdmin):
     list_display = ('short_body', 'create_date', 'update_date')
 
-    def short_body(self):
+    def short_body(self, obj):
         return 'Freely edit the content of the About page to support markdown syntax。'
 
     short_body.short_description = 'AboutBlog'