Improve docs

filter/count/mc.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package count
 
 import (
         "golang.org/x/net/context"
 
         mc "github.com/luci/gae/service/memcache"
@@ skipping 73 matching lines @@
         return ret, m.c.Stats.up(err)
 }
 
 // FilterMC installs a counter Memcache filter in the context.
 func FilterMC(c context.Context) (context.Context, *MCCounter) {
         state := &MCCounter{}
         return mc.AddFilters(c, func(ic context.Context, mc mc.Interface) mc.Interface {
                 return &mcCounter{state, mc}
         }), state
 }