Fix JSON Error

projects/finding_donors/finding_donors.ipynb

@@ -530,7 +530,7 @@
     " - Set a `random_state` if one is available to the same state you set before.\n",
     "- Create a dictionary of parameters you wish to tune for the chosen model.\n",
     " - Example: `parameters = {'parameter' : [list of values]}`.\n",
-    " - **Note:** Avoid tuning the `max_features` parameter of your learner if that parameter is available!\n" 
+    " - **Note:** Avoid tuning the `max_features` parameter of your learner if that parameter is available!\n", 
     "- Use `make_scorer` to create an `fbeta_score` scoring object (with $\\beta = 0.5$).\n",
     "- Perform grid search on the classifier `clf` using the `'scorer'`, and store it in `grid_obj`.\n",
     "- Fit the grid search object to the training data (`X_train`, `y_train`), and store it in `grid_fit`.\n",