Merge branch 'master' of https://github.com/sirupsen/logrus

Conflicts:
	alt_exit_test.go
	formatter.go
	json_formatter.go

json_formatter.go

@@ -6,8 +6,11 @@ import (
 )
 
 type fieldKey string
+
+// FieldMap allows customization of the key names for default fields.
 type FieldMap map[fieldKey]string
 
+// Default key names for the default fields
 const (
 	FieldKeyMsg   = "msg"
 	FieldKeyLevel = "level"
@@ -23,6 +26,7 @@ func (f FieldMap) resolve(key fieldKey) string {
 	return string(key)
 }
 
+// JSONFormatter formats logs into parsable json
 type JSONFormatter struct {
 	// TimestampFormat sets the format used for marshaling timestamps.
 	TimestampFormat string
@@ -30,7 +34,7 @@ type JSONFormatter struct {
 	// DisableTimestamp allows disabling automatic timestamps in output
 	DisableTimestamp bool
 
-	// FieldMap allows users to customize the names of keys for various fields.
+	// FieldMap allows users to customize the names of keys for default fields.
 	// As an example:
 	// formatter := &JSONFormatter{
 	//   	FieldMap: FieldMap{
@@ -43,13 +47,14 @@ type JSONFormatter struct {
 	FieldMap FieldMap
 }
 
+// Format renders a single log entry
 func (f *JSONFormatter) Format(entry *Entry) ([]byte, error) {
 	data := make(Fields, len(entry.Data)+4)
 	for k, v := range entry.Data {
 		switch v := v.(type) {
 		case error:
 			// Otherwise errors are ignored by `encoding/json`
-			// https://github.com/Sirupsen/logrus/issues/137
+			// https://github.com/sirupsen/logrus/issues/137
 			data[k] = v.Error()
 		default:
 			data[k] = v
@@ -60,7 +65,7 @@ func (f *JSONFormatter) Format(entry *Entry) ([]byte, error) {
 
 	timestampFormat := f.TimestampFormat
 	if timestampFormat == "" {
-		timestampFormat = DefaultTimestampFormat
+		timestampFormat = defaultTimestampFormat
 	}
 
 	if !f.DisableTimestamp {