Update Life.ipynb

ipynb/Life.ipynb

@@ -321,7 +321,7 @@
     "                         picture(world, Xs, Ys)), raw=True)\n",
     "        sleep(pause)\n",
     "        \n",
-    "def pre(text) -> str: return '<pre>' + text + '</pre>'"
+    "def pre(text) -> str: return f'<pre>{text}</pre>'"
    ]
   },
   {