Goland opens file saving and automatically formats

Mac uses the Option+Command+L shortcut to quickly format the selected code block. If you want to enable automatic formatting of the code when the file is saved, you can add a Watcher

Click Goland -> Preferences -> Tools -> File Watchers, then add a go fmt tool, then click "Apply" and "OK", so that every time the file is saved, code formatting will be automatically triggered.