diff --git a/common/errors/feature_errors.go b/common/errors/feature_errors.go
index 3cacd2b9..40c0ee9b 100644
--- a/common/errors/feature_errors.go
+++ b/common/errors/feature_errors.go
@@ -1,34 +1,34 @@
-package errors
-
-import (
-	"context"
-)
-
-// PrintMigrateFeatureInfo prints a notice of the upcoming feature migration.
-// Place it after the source feature related config file pharser code.
-// Important note: Only use this when the target migrating feature is under construction.
-// Important note: Even when the target migrating feature has finished its construction, this notice can still be used yet before announcing deprecation of the old feature.
-// Do not remove this function even there is no reference to it.
-func PrintMigrateFeatureInfo(sourceFeature string, targetFeature string) {
-	LogInfo(context.Background(), "The feature " + sourceFeature + " will be migrated to " + targetFeature + " in the future.")
-}
-
-// PrintDeprecatedFeatureWarning prints a warning for deprecated and going to be removed feature.
-// Do not remove this function even there is no reference to it.
-func PrintDeprecatedFeatureWarning(feature string, migrateFeature string) {
-	if len(migrateFeature) > 0 {
-		LogWarning(context.Background(), "This feature " + feature + " is deprecated and being migrated to " + migrateFeature + ". Please update your config(s) according to release note and documentation before removal.")
-	} else {
-		LogWarning(context.Background(), "This feature " + feature + " is deprecated. Please update your config(s) according to release note and documentation before removal.")
-	}
-}
-
-// PrintRemovedFeatureError prints an error message for removed feature then return an error. And after long enough time the message can also be removed, uses as an indicator.
-// Do not remove this function even there is no reference to it.
-func PrintRemovedFeatureError(feature string, migrateFeature string) (error) {
-	if len(migrateFeature) > 0 {
-		return New("The feature " + feature + " has been removed and migrated to " + migrateFeature + ". Please update your config(s) according to release note and documentation.")
-	} else {
-		return New("The feature " + feature + " has been removed. Please update your config(s) according to release note and documentation.")
-	}
-}
+package errors
+
+import (
+	"context"
+)
+
+// PrintMigrateFeatureInfo prints a notice of the upcoming feature migration.
+// Place it after the source feature related config file pharser code.
+// Important note: Only use this when the target migrating feature is under construction.
+// Important note: Even when the target migrating feature has finished its construction, this notice can still be used yet before announcing deprecation of the old feature.
+// Do not remove this function even there is no reference to it.
+func PrintMigrateFeatureInfo(sourceFeature string, targetFeature string) {
+	LogInfo(context.Background(), "The feature "+sourceFeature+" will be migrated to "+targetFeature+" in the future.")
+}
+
+// PrintDeprecatedFeatureWarning prints a warning for deprecated and going to be removed feature.
+// Do not remove this function even there is no reference to it.
+func PrintDeprecatedFeatureWarning(feature string, migrateFeature string) {
+	if len(migrateFeature) > 0 {
+		LogWarning(context.Background(), "This feature "+feature+" is deprecated and being migrated to "+migrateFeature+". Please update your config(s) according to release note and documentation before removal.")
+	} else {
+		LogWarning(context.Background(), "This feature "+feature+" is deprecated. Please update your config(s) according to release note and documentation before removal.")
+	}
+}
+
+// PrintRemovedFeatureError prints an error message for removed feature then return an error. And after long enough time the message can also be removed, uses as an indicator.
+// Do not remove this function even there is no reference to it.
+func PrintRemovedFeatureError(feature string, migrateFeature string) error {
+	if len(migrateFeature) > 0 {
+		return New("The feature " + feature + " has been removed and migrated to " + migrateFeature + ". Please update your config(s) according to release note and documentation.")
+	} else {
+		return New("The feature " + feature + " has been removed. Please update your config(s) according to release note and documentation.")
+	}
+}