patch 7.4.1161

Problem:    ":argadd" without argument is supposed to add the current buffer
            name to the arglist.
Solution:   Make it work as documented. (Coot, closes #577)

src/ex_cmds.h

@@ -128,7 +128,7 @@ EX(CMD_args,		"args",		ex_args,
 			BANG|FILES|EDITCMD|ARGOPT|TRLBAR,
 			ADDR_LINES),
 EX(CMD_argadd,		"argadd",	ex_argadd,
-			BANG|NEEDARG|RANGE|NOTADR|ZEROR|FILES|TRLBAR,
+			BANG|RANGE|NOTADR|ZEROR|FILES|TRLBAR,
 			ADDR_ARGUMENTS),
 EX(CMD_argdelete,	"argdelete",	ex_argdelete,
 			BANG|RANGE|NOTADR|FILES|TRLBAR,

src/ex_cmds2.c

@@ -2089,6 +2089,16 @@ do_arglist(str, what, after)
     int		match;
 #endif
 
+    /*
+     * Set default argument for ":argadd" command.
+     */
+    if (what == AL_ADD && *str == NUL)
+    {
+	if (curbuf->b_ffname == NULL)
+	    return FAIL;
+	str = curbuf->b_fname;
+    }
+
     /*
      * Collect all file name arguments in "new_ga".
      */

src/testdir/test_arglist.vim

@@ -57,6 +57,17 @@ func Test_argadd()
   +2argadd y
   call Assert_argc(['a', 'b', 'c', 'x', 'y'])
   call assert_equal(1, argidx())
+
+  %argd
+  edit d
+  arga
+  call assert_equal(len(argv()), 1)
+  call assert_equal(get(argv(), 0, ''), 'd')
+
+  %argd
+  new
+  arga
+  call assert_equal(len(argv()), 0)
 endfunc
 
 func Init_abc()

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1161,
 /**/
     1160,
 /**/