code review 6061052: ssh: cosmetic cleanups

ssh/client_auth_test.go

 // Copyright 2011 The Go 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 ssh
 
 import (
         "bytes"
         "crypto"
         "crypto/dsa"
@@ skipping 67 matching lines @@
 
 func (k *keychain) Sign(i int, rand io.Reader, data []byte) (sig []byte, err error) {
         hashFunc := crypto.SHA1
         h := hashFunc.New()
         h.Write(data)
         digest := h.Sum(nil)
         switch key := k.keys[i].(type) {
         case *rsa.PrivateKey:
                 return rsa.SignPKCS1v15(rand, key, hashFunc, digest)
         }
-        return nil, errors.New("unknown key type")
+        return nil, errors.New("ssh: unknown key type")
 }
 
 func (k *keychain) loadPEM(file string) error {
         buf, err := ioutil.ReadFile(file)
         if err != nil {
                 return err
         }
         block, _ := pem.Decode(buf)
         if block == nil {
                 return errors.New("ssh: no key found")
@@ skipping 170 matching lines @@
                                 MACs: []string{mac},
                         },
                 }
                 c, err := Dial("tcp", newMockAuthServer(t), config)
                 if err != nil {
                         t.Fatalf("client could not authenticate with mac algo %s: %v", mac, err)
                 }
                 c.Close()
         }
 }