blue changes `%autoreload 2` in jupyter ntoebooks to random hex

[Vulwsztyn]

How to reproduce:

1. create a jupyter notebook file with content:

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "%load_ext autoreload\n",
    "%autoreload 2"
   ]
  }
 ],
 "metadata": {
  "language_info": {
   "name": "python"
  },
  "orig_nbformat": 4
 },
 "nbformat": 4,
 "nbformat_minor": 2
}

2. have blue and black[jupyter] installed,
3. run blue

Most env agnostic way would be:
2. run docker container run -it -v pwd:/app -w /app pyfound/black bash
3. (inside the docker) run pip install black[jupyter]; pip install blue
4. (inside the docker) run blue .

Current behaviour:
The

%load_ext autoreload
%autoreload 2

in jupyter notebook gets formatted as:

""%load_ext autoreload""
'b3d554e307.'

Expected behaviour:
it is left unchanged.