patch 8.1.0118: duplicate error message for put command

Problem:    Duplicate error message for put command.
Solution:   Check return value of u_save(). (Jason Franklin)
diff --git a/src/testdir/test_messages.vim b/src/testdir/test_messages.vim
index 384d2aa..a85799e 100644
--- a/src/testdir/test_messages.vim
+++ b/src/testdir/test_messages.vim
@@ -39,7 +39,7 @@
   endtry
 endfunction
 
-" Patch 7.4.1696 defined the "clearmode()" command for clearing the mode
+" Patch 7.4.1696 defined the "clearmode()" function for clearing the mode
 " indicator (e.g., "-- INSERT --") when ":stopinsert" is invoked.  Message
 " output could then be disturbed when 'cmdheight' was greater than one.
 " This test ensures that the bugfix for this issue remains in place.