Sometimes, after I select a suggestion (from the completion pop-up that appears when pressing Ctrl-N) using the Enter key, Vim will insert a newline and the cursor will be moved to the following line. This doesn't always happen - it seems that Vim tries to be smart about it and will only move me to the next line if it thinks this is what I would like.
However, I want to disable this behavior (because it is not always smart) so that I will always have to move to the next line by myself by manually pressing the Enter key. Is this possible?