function pointed out by `dabbrev-friend-buffer-function' to find the
completions.
-If the prefix argument is 16 (which comes from \\[prefix-argument] \\[prefix-argument]),
+If the prefix argument is 16 (which comes from \\[universal-argument] \\[universal-argument]),
then it searches *all* buffers."
(interactive "*P")
(dabbrev--reset-global-variables)