patch 9.1.1915: :breaklist accepts unprocessed arguments.

Problem:  :breaklist accepts unprocessed arguments.
Solution: Remove EX_EXTRA flag from the Ex command definition.
          (Doug Kearns)

The command should emit an "E488: Trailing characters" error rather than
silently accept arguments.

closes: #18746

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/ex_cmds.h

@@ -234,7 +234,7 @@ EXCMD(CMD_breakdel,	"breakdel",	ex_breakdel,
 	EX_EXTRA|EX_TRLBAR|EX_CMDWIN|EX_LOCK_OK,
 	ADDR_NONE),
 EXCMD(CMD_breaklist,	"breaklist",	ex_breaklist,
-	EX_EXTRA|EX_TRLBAR|EX_CMDWIN|EX_LOCK_OK,
+	EX_TRLBAR|EX_CMDWIN|EX_LOCK_OK,
 	ADDR_NONE),
 EXCMD(CMD_browse,	"browse",	ex_wrongmodifier,
 	EX_NEEDARG|EX_EXTRA|EX_NOTRLCOM|EX_CMDWIN|EX_LOCK_OK,

src/testdir/test_cmdline.vim

@@ -5176,4 +5176,9 @@ func Test_update_screen_after_wildtrigger()
   call StopVimInTerminal(buf)
 endfunc
 
+func Test_breaklist_args_fails()
+  call assert_match('No breakpoints defined', execute(':breaklist'))
+  call assert_fails(':breaklist extra', 'E488:')
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab

src/version.c

@@ -729,6 +729,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1915,
 /**/
     1914,
 /**/