vim-patch:8.1.1992: the search stat moves when wrapping at the end of the buffer

Problem:    The search stat moves when wrapping at the end of the buffer.
Solution:   Put the "W" in front instead of at the end.
16b58ae9f3

src/nvim/search.c

@@ -4359,7 +4359,9 @@ static void search_stat(int dirc, pos_T *pos,
 
       len = STRLEN(t);
       if (show_top_bot_msg && len + 2 < SEARCH_STAT_BUF_LEN) {
-        STRCPY(t + len, " W");
+        memmove(t + 2, t, len);
+        t[0] = 'W';
+        t[1] = ' ';
         len += 2;
       }