Fix some lint errors (#121)

* gofmt -s
* fix golint  warnings about function commentary
* ineffectual assignment to err (ineffassign)

Author: cassiobotaro

payload/builder.go

@@ -237,7 +237,7 @@ func (p *Payload) AlertActionLocKey(key string) *Payload {
 	return p
 }
 
-// SummaryArg sets the aps alert summary arg key on the payload.
+// AlertSummaryArg sets the aps alert summary arg key on the payload.
 // This is the string that is used as a key to fill in an argument
 // at the bottom of a notification to provide more context, such as
 // a name associated with the sender of the notification.
@@ -248,7 +248,7 @@ func (p *Payload) AlertSummaryArg(key string) *Payload {
 	return p
 }
 
-// SummaryArgCount sets the aps alert summary arg count key on the payload.
+// AlertSummaryArgCount sets the aps alert summary arg count key on the payload.
 // This integer sets a custom "weight" on the notification, effectively
 // allowing a notification to be viewed internally as two. For example if
 // a notification encompasses 3 messages, you can set it to 3.

payload/builder_test.go

@@ -187,7 +187,7 @@ func TestAlertSummaryArgCount(t *testing.T) {
 	b, _ := json.Marshal(payload)
 	assert.Equal(t, `{"aps":{"alert":{"summary-arg-count":3}}}`, string(b))
 }
-	
+
 func TestCombined(t *testing.T) {
 	payload := NewPayload().Alert("hello").Badge(1).Sound("Default.caf").Custom("key", "val")
 	b, _ := json.Marshal(payload)

token/token_test.go

@@ -86,8 +86,7 @@ func TestGenerateWithNoAuthKey(t *testing.T) {
 
 func TestGenerateWithInvalidAuthKey(t *testing.T) {
 	pubkeyCurve := elliptic.P521()
-	privatekey, err := ecdsa.GenerateKey(pubkeyCurve, rand.Reader)
-
+	privatekey, _ := ecdsa.GenerateKey(pubkeyCurve, rand.Reader)
 	token := &token.Token{
 		AuthKey: privatekey,
 	}