updated for version 7.3.598

Problem:    Cannot act upon end of completion. (Taro Muraoka)
Solution:   Add an autocommand event that is triggered when completion has
            finished. (Idea by Florian Klein)

src/fileio.c

@@ -7643,6 +7643,7 @@ static struct event_name
     {"CmdwinEnter",	EVENT_CMDWINENTER},
     {"CmdwinLeave",	EVENT_CMDWINLEAVE},
     {"ColorScheme",	EVENT_COLORSCHEME},
+    {"CompleteDone",	EVENT_COMPLETEDONE},
     {"CursorHold",	EVENT_CURSORHOLD},
     {"CursorHoldI",	EVENT_CURSORHOLDI},
     {"CursorMoved",	EVENT_CURSORMOVED},