code: function condition(file){
      var suffix = file.path.substr(file.base.length);
      var re = new RegExp(specialChars);
      var flag = service === "hosting" && re.test(suffix);
      var warning = "Warning: Cannot sync files with characters: " + specialChars + " in the file name: ";
      if (flag){
        var message = warning + suffix;
        console.log(message.red);
      }
      return flag;
    }
docs: exclude files with special characters in name