Some more things regarding #4269

thirdparty/bottle/bottle.py

@@ -570,7 +570,7 @@ class Route(object):
 
     def prepare(self):
         """ Do all on-demand work immediately (useful for debugging)."""
-        self.call
+        self.call()
 
     def all_plugins(self):
         """ Yield all Plugins affecting this route. """
@@ -1518,7 +1518,7 @@ class BaseRequest(object):
             raise AttributeError("Attribute already defined: %s" % name)
         self.environ[key] = value
 
-    def __delattr__(self, name, value):
+    def __delattr__(self, name):
         try:
             del self.environ['bottle.request.ext.%s' % name]
         except KeyError: