Replace `iff' in doc-strings and comments.

diff --git a/lisp/obsolete/fast-lock.el b/lisp/obsolete/fast-lock.el
index a2405b0edb2e2639ba8fc7371997c67bfac9a983..569771143e30dcc18d777ebdd6bc09dab6e2d015 100644 (file)
--- a/lisp/obsolete/fast-lock.el
+++ b/lisp/obsolete/fast-lock.el
@@ -523,7 +523,7 @@ See `fast-lock-cache-directories'."
                ;; Just a directory.
                directory)
               (t
-               ;; A directory iff the file name matches the regexp.
+               ;; A directory if the file name matches the regexp.
                (let ((bufile (expand-file-name buffer-file-truename))
                      (case-fold-search nil))
                  (when (save-match-data (string-match (car directory) bufile))