saved-cmpl-file-header
saved-cmpl-file-header is a variable defined in `completion.el
'.
Its value is ";;; Completion Initialization file.\n;; Version = %s\n;; Format is (. )\n;; is the completion\n;; is the time the completion was last used\n;; If it is t, the completion will never be pruned from the file.\n;; Otherwise it is in hours since origin.\n\n"
- This variable may be risky if used as a file-local variable.