When I type some letters and hit CTRL+P, vim shows a list of possible words that may complete my letters. On the left of the list, it shows the completed word. And on the right of the list, it shows where vim finds the word (like a name of a file that contains the word).
However, if there's only one possible word, vim doesn't show the list but just shows
-- Keyword completion (^N^P) The only match on the status bar. How to make vim show where it finds the word as well?