diff --git a/viper.go b/viper.go
index 18252b5..2b0f2fa 100644
--- a/viper.go
+++ b/viper.go
@@ -649,7 +649,7 @@ func (v *Viper) Get(key string) interface{} {
 
 // Sub returns new Viper instance representing a sub tree of this instance.
 // Sub is case-insensitive for a key. The Viper object that is returned however
-// is not a fully functional `Viper`. It will not include any values set with 
+// is not a fully functional `Viper`. It will not include any values set with
 // BindEnv and Unmarshal is not supported.
 func Sub(key string) *Viper { return v.Sub(key) }
 func (v *Viper) Sub(key string) *Viper {