old_contents: import yaml
  
  from .loader import Loader, I18nFileLoadError
  
  class YamlLoader(Loader):
      """class to load yaml files"""
      def __init__(self):
          super(YamlLoader, self).__init__()
  
      def parse_file(self, file_content):
          try:
              return yaml.load(file_content)
          except yaml.scanner.ScannerError as e:
              raise I18nFileLoadError("invalid YAML: {0}".format(str(e)))
  
new_contents: import yaml
  
  from .loader import Loader, I18nFileLoadError
  
  class YamlLoader(Loader):
      """class to load yaml files"""
      def __init__(self):
          super(YamlLoader, self).__init__()
  
      def parse_file(self, file_content):
          try:
              return yaml.load(file_content, Loader=yaml.FullLoader)
          except yaml.scanner.ScannerError as e:
              raise I18nFileLoadError("invalid YAML: {0}".format(str(e)))
  
subject: fix yaml loader , closes #11