DisableColors in two tests to fix AppEngine configuration

example_basic_test.go

@@ -1,14 +1,16 @@
 package logrus_test
 
 import (
-	"github.com/sirupsen/logrus"
 	"os"
+
+	"github.com/sirupsen/logrus"
 )
 
 func Example_basic() {
 	var log = logrus.New()
 	log.Formatter = new(logrus.JSONFormatter)
 	log.Formatter = new(logrus.TextFormatter)                     //default
+	log.Formatter.(*logrus.TextFormatter).DisableColors = true    // remove colors
 	log.Formatter.(*logrus.TextFormatter).DisableTimestamp = true // remove timestamp from test output
 	log.Level = logrus.DebugLevel
 	log.Out = os.Stdout