diff --git a/gogs.go b/gogs.go
index 1e614f4958..7a7d3ac873 100644
--- a/gogs.go
+++ b/gogs.go
@@ -1,3 +1,5 @@
+// +build go1.2
+
 // Copyright 2014 The Gogs Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
@@ -14,8 +16,6 @@ import (
 	"github.com/gogits/gogs/modules/base"
 )
 
-// +build go1.2
-
 // Test that go1.2 tag above is included in builds. main.go refers to this definition.
 const go12tag = true
 
diff --git a/models/models_sqlite.go b/models/models_sqlite.go
index 1d80823fe5..c77e5ae5a6 100644
--- a/models/models_sqlite.go
+++ b/models/models_sqlite.go
@@ -1,9 +1,9 @@
+// +build sqlite
+
 // Copyright 2014 The Gogs Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
-// +build sqlite
-
 package models
 
 import (
diff --git a/models/update.go b/models/update.go
index 53591fa42e..ba0e979348 100644
--- a/models/update.go
+++ b/models/update.go
@@ -39,12 +39,12 @@ func Update(refName, oldCommitId, newCommitId, userName, repoName string, userId
 	if isNew {
 		l, err = newCommit.CommitsBefore()
 		if err != nil {
-			qlog.Fatalf("Find CommitsBefore erro:", err)
+			qlog.Fatalf("Find CommitsBefore erro: %v", err)
 		}
 	} else {
 		l, err = newCommit.CommitsBeforeUntil(oldCommitId)
 		if err != nil {
-			qlog.Fatalf("Find CommitsBeforeUntil erro:", err)
+			qlog.Fatalf("Find CommitsBeforeUntil erro: %v", err)
 			return
 		}
 	}
diff --git a/modules/base/tool.go b/modules/base/tool.go
index 0f06b3e0e2..082c039250 100644
--- a/modules/base/tool.go
+++ b/modules/base/tool.go
@@ -284,7 +284,6 @@ func TimeSince(then time.Time) string {
 	default:
 		return fmt.Sprintf("%d years %s", diff/Year, lbl)
 	}
-	return then.String()
 }
 
 const (
diff --git a/modules/mailer/mail.go b/modules/mailer/mail.go
index d2bf1310a0..834f4a898a 100644
--- a/modules/mailer/mail.go
+++ b/modules/mailer/mail.go
@@ -152,7 +152,7 @@ func SendIssueMentionMail(user, owner *models.User, repo *models.Repository, iss
 	}
 
 	issueLink := fmt.Sprintf("%s%s/%s/issues/%d", base.AppUrl, owner.Name, repo.Name, issue.Index)
-	body := fmt.Sprintf(`%s mentioned you.`)
+	body := fmt.Sprintf(`%s mentioned you.`, user.Name)
 	subject := fmt.Sprintf("[%s] %s", repo.Name, issue.Name)
 	content := fmt.Sprintf("%s<br>-<br> <a href=\"%s\">View it on Gogs</a>.", body, issueLink)
 	msg := NewMailMessageFrom(tos, user.Name, subject, content)
diff --git a/modules/middleware/binding_test.go b/modules/middleware/binding_test.go
index 654cef29f1..2a74e1a6cc 100644
--- a/modules/middleware/binding_test.go
+++ b/modules/middleware/binding_test.go
@@ -121,7 +121,7 @@ func handle(test testCase, t *testing.T, index int, post BlogPost, errors Errors
 	if test.ok && errors.Count() > 0 {
 		t.Errorf("%+v should be OK (0 errors), but had errors: %+v", test, errors)
 	} else if !test.ok && errors.Count() == 0 {
-		t.Errorf("%+v should have errors, but was OK (0 errors): %+v", test)
+		t.Errorf("%+v should have errors, but was OK (0 errors)", test)
 	}
 }
 
@@ -132,7 +132,7 @@ func handleEmpty(test emptyPayloadTestCase, t *testing.T, index int, section Blo
 	if test.ok && errors.Count() > 0 {
 		t.Errorf("%+v should be OK (0 errors), but had errors: %+v", test, errors)
 	} else if !test.ok && errors.Count() == 0 {
-		t.Errorf("%+v should have errors, but was OK (0 errors): %+v", test)
+		t.Errorf("%+v should have errors, but was OK (0 errors)", test)
 	}
 }
 
diff --git a/modules/oauth2/oauth2.go b/modules/oauth2/oauth2.go
index 05ae4606a5..dcb6d0a434 100644
--- a/modules/oauth2/oauth2.go
+++ b/modules/oauth2/oauth2.go
@@ -9,7 +9,6 @@ package oauth2
 
 import (
 	"encoding/json"
-	"fmt"
 	"net/http"
 	"net/url"
 	"strings"
@@ -95,11 +94,6 @@ func (t *token) ExpiryTime() time.Time {
 	return t.Expiry
 }
 
-// Formats tokens into string.
-func (t *token) String() string {
-	return fmt.Sprintf("tokens: %v", t)
-}
-
 // Returns a new Google OAuth 2.0 backend endpoint.
 func Google(opts *Options) martini.Handler {
 	opts.AuthUrl = "https://accounts.google.com/o/oauth2/auth"