Fix test failures with s/json/json:/

Signed-off-by: Tim Van Steenburgh <tvansteenburgh@gmail.com>
diff --git a/ForgeWiki/forgewiki/wiki_main.py b/ForgeWiki/forgewiki/wiki_main.py
index ce1e2b7..01a6008 100644
--- a/ForgeWiki/forgewiki/wiki_main.py
+++ b/ForgeWiki/forgewiki/wiki_main.py
@@ -533,7 +533,7 @@
                     hide_left_bar=hide_left_bar)
 
     @without_trailing_slash
-    @expose('json')
+    @expose('json:')
     @require_post()
     def delete(self):
         require_access(self.page, 'delete')
@@ -541,7 +541,7 @@
         return dict(location='../' + self.page.title + '/?deleted=True')
 
     @without_trailing_slash
-    @expose('json')
+    @expose('json:')
     @require_post()
     def undelete(self):
         require_access(self.page, 'delete')
@@ -601,7 +601,7 @@
             self.page.url())
 
     @without_trailing_slash
-    @expose('json')
+    @expose('json:')
     @require_post()
     @validate(dict(version=validators.Int(if_empty=1, if_invalid=1)))
     def revert(self, version, **kw):