(defcustom hippie-expand-only-buffers ()
"*A list specifying the only buffers to search (in addition to current).
Can contain both regexps matching buffer names (as strings) and major modes
-\(as atoms). If non-NIL, this variable overrides the variable
+\(as atoms). If non-nil, this variable overrides the variable
`hippie-expand-ignore-buffers'."
:type '(repeat (choice regexp (symbol :tag "Major Mode")))
:group 'hippie-expand)
;; Check if STR is a member of LST.
-;; Transform to the final case if optional TRANS-CASE is non-NIL.
+;; Transform to the final case if optional TRANS-CASE is non-nil.
(defun he-string-member (str lst &optional trans-case)
(if str
(member (if (and trans-case