patch 9.0.0828: various typos

Problem:    Various typos.
Solution:   Correct typos. (closes #11432)
diff --git a/src/scriptfile.c b/src/scriptfile.c
index 9623ea0..d348631 100644
--- a/src/scriptfile.c
+++ b/src/scriptfile.c
@@ -1201,7 +1201,7 @@
     int	    multi_mods = 0;
 
     buf[0] = NUL;
-    (void)add_win_cmd_modifers(buf, &cmdmod, &multi_mods);
+    (void)add_win_cmd_modifiers(buf, &cmdmod, &multi_mods);
 
     vim_setenv((char_u *)"OPTWIN_CMD", buf);
     cmd_source((char_u *)SYS_OPTWIN_FILE, NULL);