fix test error

dapp/cert/const.go

@@ -6,4 +6,4 @@ const (
 	CertActionNormal = 3
 )
 
-const CertX = "cert"
\ No newline at end of file
+const CertX = "cert"

proto/cert.proto

@@ -34,4 +34,4 @@ message CertSignature {
     bytes signature = 1;
     bytes cert      = 2;
     bytes uid       = 3;
-}
\ No newline at end of file
+}

types/utils.go

@@ -76,4 +76,4 @@ func ReadFile(file string) ([]byte, error) {
 	}
 
 	return fileCont, nil
-}
\ No newline at end of file
+}