Fix readme formatting

README.md

@@ -76,7 +76,8 @@ def hello():
     return 'Hello World! I have been seen %s times.' % redis.get('hits')
 
 if __name__ == "__main__":
-    app.run(host="0.0.0.0", debug=True)```
+    app.run(host="0.0.0.0", debug=True)
+```
 
 We define our Python dependencies in a file called `requirements.txt`: