feat(eval/method): partially port v8.1.1953

Adds method call support for all functions in the patch, but it cannot
be fully ported due to missing tests for:

- index(): requires Blobs from v8.1.0735.
           Note that index() was already added as a method in v8.1.1803;
           this patch only adds a test.

- iconv(): requires v8.1.1136 for test_termcodes.vim.

Nvim deprecated inputdialog(), so it no longer has an eval.txt entry.

Keep the test for hlexists() commented-out, just like previously. (Nvim
always defines the Number group, so it always returns 1 instead)

Cannot include both changes to test_syn_attr.vim as Nvim doesn't support
":hi term=..."; however, both test the same ->hlID() syntax anyway.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/functional/legacy/delete_spec.lua b/test/functional/legacy/delete_spec.lua
index b4ed8ff136..141d9583e6 100644
--- a/test/functional/legacy/delete_spec.lua
+++ b/test/functional/legacy/delete_spec.lua
@@ -39,7 +39,7 @@ describe('Test for delete()', function()
     eq(eval("['a', 'b']"), eval("readfile('Xdir1/Xfile')"))
     eq(1, eval("isdirectory('Xdir1/subdir')"))
     eq(eval("['a', 'b']"), eval("readfile('Xdir1/subdir/Xfile')"))
-    eq(1, eval("isdirectory('Xdir1/empty')"))
+    eq(1, eval("'Xdir1/empty'->isdirectory()"))
     eq(0, eval("delete('Xdir1', 'rf')"))
     eq(0, eval("isdirectory('Xdir1')"))
     eq(-1, eval("delete('Xdir1', 'd')"))