Small typos in tutorial day 3, 3

day_3/tutorial_3.ipynb

@@ -179,7 +179,7 @@
    },
    "outputs": [],
    "source": [
-    "#!wget -O i140703-001.nix https://gin.g-node.org/sprenger/multielectrode_grasp/raw/dataset_nix/datasets_nix/i140703-001_cut_74sec.nix"
+    "!wget -O i140703-001.nix https://gin.g-node.org/sprenger/multielectrode_grasp/raw/dataset_nix/datasets_nix/i140703-001_cut_74sec.nix"
    ]
   },
   {