This is golden, I didn't know that. A perfect example of the infinite features that can be found in bash manual page. I've been using bash since the early 90's

This is golden, I didn't know that. A perfect example of the infinite features that can be found in bash manual page. I've been using bash since the early 90's and I've written lots of non-trivial programs in bash, and I know a lot many other people don't know and yet I had somehow managed to miss this pearl.