The first letter should be small in errors.New

contrib/mesos/pkg/scheduler/errors/errors.go

@@ -21,8 +21,8 @@ import (
 )
 
 var (
-	NoSuchPodErr               = errors.New("No such pod exists")
-	NoSuchTaskErr              = errors.New("No such task exists")
+	NoSuchPodErr               = errors.New("no such pod exists")
+	NoSuchTaskErr              = errors.New("no such task exists")
 	ReconciliationCancelledErr = errors.New("explicit task reconciliation cancelled")
-	NoSuitableOffersErr        = errors.New("No suitable offers for pod/task")
+	NoSuitableOffersErr        = errors.New("no suitable offers for pod/task")
 )