[vpython] Fix PEP425 naming.

vpython/application/application.go

 // Copyright 2017 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package application
 
 import (
         "flag"
         "fmt"
         "io/ioutil"
@@ skipping 84 matching lines @@
         // a generated script is expected to exist longer than this, we will error.
         //
         // See venv.Config's MaxScriptPathLen.
         MaxScriptPathLen int
 
         // WithVerificationConfig, if not nil, runs the supplied callback with
         // a Config instance to use for verification and the set of default
         // verification scenarios.
         //
         // If nil, verification will only include the validation of the spec protobuf.
-        WithVerificationConfig func(context.Context, func(Config, []*vpythonAPI.Pep425Tag) error) error
+        WithVerificationConfig func(context.Context, func(Config, []*vpythonAPI.PEP425Tag) error) error
 }
 
 type application struct {
         *Config
 
         // opts is the set of configured options.
         opts vpython.Options
 
         help      bool
         devMode   bool
@@ skipping 196 matching lines @@
                 },
                 logConfig: logging.Config{
                         Level: logging.Error,
                 },
         }
 
         return run(c, func(c context.Context) error {
                 return a.mainImpl(c, os.Args[0], os.Args[1:])
         })
 }