code: def save(self, branch, commit_message, **kwargs):
          
          self.branch = branch
          self.commit_message = commit_message
          self.file_path = self.file_path.replace('/', '%2F')
          super(ProjectFile, self).save(**kwargs)
docs: Save the changes made to the file to the server.
  
          The object is updated to match what the server returns.
  
          Args:
              branch (str): Branch in which the file will be updated
              commit_message (str): Message to send with the commit
              **kwargs: Extra options to send to the server (e.g. sudo)
  
          Raises:
              GitlabAuthenticationError: If authentication is not correct
              GitlabUpdateError: If the server cannot perform the request