completion-search-peekcompletion-search-peek is a compiled Lisp function in `
completion.el'. (completion-search-peek USE-CDABBREV) Return the next completion entry without actually moving the pointers. Calling this again or calling `completion-search-next' results in the same string being returned. Depends on `case-fold-search'. If there are no more entries, try cdabbrev and then return only a string.