Automatically Mark Prompt Lines

Thanks to a tweet by John Siracusa, I noticed something I’ve had enabled on my computer for months and never noticed (but now can’t unsee): automatically marked prompt lines in Terminal:

Notice the square brackets around the executed command on the first line?

[jared@Jared-MBP:~$ ll A*                   ]

According to this answer on an Ask Different question, every time you press return on the keyboard, the line is ‘marked’, and you can use cmd+up and cmd+down to jump back and forth between marked lines.

Now that this has been pointed out to me, I’ve started playing with it, and it seems like a really nice feature I’m going to get used to really quick.