docs: def ensure_dict_key_title(dict_obj):
      """Set the dict key as key.title(); keys should be str.
      Always be used to headers.
  
          >>> from torequests.utils import ensure_dict_key_title
          >>> ensure_dict_key_title({'hello-world':1, 'HELLOWORLD':2})
          {'Hello-World': 1, 'Helloworld': 2}
      """
      if not all((isinstance(i, unicode) for i in dict_obj.keys())):
          return dict_obj
      return {key.title(): value for key, value in dict_obj.items()}