patch 8.2.1167: Vim9: builtin function method call only supports first arg

Problem:    Vim9: builtin function method call only supports first argument.
Solution:   Shift arguments when needed. (closes #6305, closes #6419)
diff --git a/src/testdir/test_vim9_disassemble.vim b/src/testdir/test_vim9_disassemble.vim
index 27d16a5..a63779a 100644
--- a/src/testdir/test_vim9_disassemble.vim
+++ b/src/testdir/test_vim9_disassemble.vim
@@ -1278,4 +1278,22 @@
         res)
 enddef
 
+def s:CallAppend()
+  eval "some text"->append(2)
+enddef
+
+def Test_shuffle()
+  let res = execute('disass s:CallAppend')
+  assert_match('<SNR>\d*_CallAppend\_s*' ..
+        'eval "some text"->append(2)\_s*' ..
+        '\d PUSHS "some text"\_s*' ..
+        '\d PUSHNR 2\_s*' ..
+        '\d SHUFFLE 2 up 1\_s*' ..
+        '\d BCALL append(argc 2)\_s*' ..
+        '\d DROP\_s*' ..
+        '\d PUSHNR 0\_s*' ..
+        '\d RETURN',
+        res)
+enddef
+
 " vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker