The new oldtest directory is in test/old/testdir. The reason for this is
that many tests have hardcoded the parent directory name to be
'testdir'.

Problem:    If 'endofline' is set the CTRL-Z may be written in the wrong
            place.
Solution:   Write CTRL-Z at the end of the file.  Update the help to explain
            the possibilities better. (Ken Takata, closes vim/vim#11486)

https://github.com/vim/vim/commit/3af982196b1b973e953c35351961f2a96fe34172

Co-authored-by: K.Takata <kentkt@csc.jp>

Problem:    Still a build error, tests are failing.
Solution:   Correct recent changes. Add missing init for 'eof'.

https://github.com/vim/vim/commit/1577537f109d97a975fda9a899cacfb598617767

vim-patch:1577537f109d

Co-authored-by: Bram Moolenaar <Bram@vim.org>

Problem:    CTRL-Z at end of file is always dropped.
Solution:   Add the 'endoffile' option, like the 'endofline' option.
            (closes vim/vim#11408, closes vim/vim#11397)

Cherry-pick test_fixeol.vim changes from patch 8.2.1432.
Cherry-pick 'endoffile' changes from latest Vim runtime update.

https://github.com/vim/vim/commit/fb0cf2357e0c85bbfd9f9178705ad8d77b6b3b4e

vim-patch:f0b567e32a46

Revert unintended Makefile change

https://github.com/vim/vim/commit/f0b567e32a462fe838170a202919d18b53eff987

vim-patch:72c8e3c070b3

Fix wrong struct access for member.

https://github.com/vim/vim/commit/72c8e3c070b30f82bc0d203a62c168e43a13e99b

vim-patch:3f68a4136eb9

Add missing entry for the 'endoffile' option.

https://github.com/vim/vim/commit/3f68a4136eb99840d739af5133ab31948f273f63

Co-authored-by: Bram Moolenaar <Bram@vim.org>

Problem:    Still too many old style tests.
Solution:   Convert a few more tests to new style. (Yegappan Lakshmanan,
            closes vim/vim#2326)

https://github.com/vim/vim/commit/209d3874c19d73b209e7d223cf05ea22e183f408