Goland "a...:" appearing in fmt.Println()

Hello, just starting to learn Go. Started with a simple hello world in Goland. I see a strange "a...:" appearing in the fmt.Println only in IDE GUI. This string doesn't appear in the src helloworld.go file. What is that string "a...:"? How do I turn it off? Code runs fine. I am on a Mac Catalina, latest version of go and Goland.