Add bonus tip to README.md

README.md

@@ -185,3 +185,25 @@ This may include:
 - Measuring the time
 
 ## Other usefull tasks [Bonus Points]
+
+#### Settings.json
+Instead of running
+```shell
+black --line-length 120 ~/git/plr-exercise
+```
+each time you want to reformat, you can instead open your vscode user settings:
+
+`ctrl+shit+p` -> "Open User Settings (JSON)"
+
+_Note:_ if you want this to apply only to your current project (not all your vscode projects), open workspace settings instead.
+
+and edit it to add python options that format automatically every time you save:
+```
+    "[python]": {
+        "editor.formatOnSave": true,
+        "editor.defaultFormatter": "ms-python.black-formatter",
+    },
+    "black-formatter.args": [
+        "--line-length=120" // Or anything you prefer.
+    ],
+```