+;; If set, the variable `hippie-expand-only-buffers' does the opposite
+;; of `hippie-expand-ignore-buffers', in that the search is restricted
+;; to only the kind of buffers listed.
+;; If the variable `hippie-expand-no-restriction' is non-nil, narrowed
+;; buffers are widened before they are searched.
+;; The variable `hippie-expand-dabbrev-skip-space' controls whether
+;; trailing spaces will be included in the abbreviation to search for,
+;; which then gives the same behavior as the original `dabbrev-expand'.
+;; The variable `hippie-expand-dabbrev-as-symbol' controls whether
+;; characters of syntax '_' is considered part of the words to expand
+;; dynamically.