Conversion of MailFileSystem object to MString.

__SMTP_DATA.h

@@ -9,7 +9,7 @@ namespace mail {
    class __SMTP_DATA : public SMTPCommand {
 
     public:
-      
+
       int processCommand(coreutils::ZString &request, SMTPSession &session, SMTPServer &server) override;
 
       coreutils::MString generateMailFileName();