This Practice is about how to break long lines of code. It suggests breaking them before an operator, so the operator serves as a visual cue on the left, where you’re likely to be reading, that this line is continued from last time.
I admit, when I first read this, I disliked it. It was one of those “That’s not how my fingers want to do it!” But I tried it. I spent weeks arguing with my fingers, “No, try this.”
I got used to it.
I discovered that I, personally, don’t care much. I don’t find the beginning of the line to make that big a difference as compared to the end. I apparently don’t scan code that way much; I seem to read the whole block or none at all.
I’ve kept doing it, hoping it helps other readers, but it isn’t a big difference for me, personally.