vim-patch:8.2.0871: cannot use getmarklist() as a method

Problem:    Cannot use getmarklist() as a method.
Solution:   Make getmarklist() work as a method.  Add one to the column
            number to match getpos(). (Yegappan Lakshmanan, closes vim/vim#6176)
f17e7ea67a

The rest of this patch was ported in:
a1ed941a78

runtime/doc/eval.txt

@@ -5203,6 +5203,9 @@ getmarklist([{buf}])					*getmarklist()*
 		Refer to |getpos()| for getting information about a specific
 		mark.
 
+		Can also be used as a |method|: >
+			GetBufnr()->getmarklist()
+
 getmatches([{win}])					*getmatches()*
 		Returns a |List| with all matches previously defined for the
 		current window by |matchadd()| and the |:match| commands.

src/nvim/eval.lua

@@ -161,7 +161,7 @@ return {
     getjumplist={args={0, 2}, base=1},
     getline={args={1, 2}, base=1},
     getloclist={args={1, 2}},
-    getmarklist={args={0, 1}},
+    getmarklist={args={0, 1}, base=1},
     getmatches={args={0, 1}},
     getmousepos={},
     getpid={},

src/nvim/testdir/test_marks.vim

@@ -227,7 +227,7 @@ func Test_getmarklist()
   call cursor(2, 2)
   normal mr
   call assert_equal({'mark' : "'r", 'pos' : [bufnr(), 2, 2, 0]},
-        \ getmarklist(bufnr())[0])
-  call assert_equal([], getmarklist({}))
+        \ bufnr()->getmarklist()[0])
+  call assert_equal([], {}->getmarklist())
   close!
 endfunc