"Fontification function set by lazy-highlighting completions styles.
When a given style wants to enable support for `completion-lazy-hilit'
\(which see), that style should set this variable to a function of one
-argument. It will be called with a completion candidate, a string, to
-be displayed to the user, and should destructively propertize the string
-with the `face' property.")
+argument. It will be called with each completion candidate, a string, to
+be displayed to the user, and should destructively propertize these
+strings with the `face' property.")
(defun completion-lazy-hilit (str)
"Return a copy of completion candidate STR that is `face'-propertized.