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:    Rubyeval() not tested as a method.
Solution:   Change a test case.
https://github.com/vim/vim/commit/4a4981b7cd57b0b2289ed4f9d621ef4d90d767f0

Problem:    Ruby interface not tested enough.
Solution:   Add a couple more tests. (Dominique Pellé, closes vim/vim#6301)
https://github.com/vim/vim/commit/a190548e9165bbae75144a3e47f01d7708b29073

Problem:    Ruby test fails on MS-Windows.
Solution:   Remove the "maintainer" line. (Ken Takata, closes vim/vim#6015)
https://github.com/vim/vim/commit/88e6cc253903c86d06abb59b35c85e6aef0152f3

Cherry-pick feature check from patch 8.1.1544.
Cherry-pick test_ruby.vim changes from patch 8.2.0183.

Problem:    No eval function for Ruby.
Solution:   Add rubyeval(). (Ozaki Kiichi, closes vim/vim#4152)
https://github.com/vim/vim/commit/e99be0e6d28fad96efd2b2be23fa38e7559e80e1

Problem:    Ruby Kernel.#p method always returns nil.
Solution:   Copy p method implementation from Ruby code. (Masataka Pocke
            Kuwabara, closes vim/vim#3315)
https://github.com/vim/vim/commit/51e9fbf1c7ab4ec61ac959d72d5d5cb0a0b356bb

Problem:    Not enough testing for the Ruby interface.
Solution:   Add more tests. (Dominique Pelle, closes vim/vim#3252)
https://github.com/vim/vim/commit/edd6aacb010ad2402fc98f19e7f6b7c29ba2656f

Modified some tests to make them pass for Neovim.
Some tests will always fail because +ruby is externalized in Neovim.
Skip failing ruby tests for now.

Problem:    Ruby converts v:true and v:false to a number.
Solution:   Use Qtrue and Qfalse instead. (Masataka Pocke Kuwabara,
            closes vim/vim#3259)
https://github.com/vim/vim/commit/d84b26a03b13cd816d80ff32b61e8de740d499ce

nvim does not support v:none.

Problem:    Preferred cursor column not set in interfaces.
Solution:   Set w_set_curswant when setting the cursor. (David Hotham,
            closes vim/vim#3060)
https://github.com/vim/vim/commit/53901442f37a59e5495165f91db5574c0b43ab04

This contains test_ruby changes only.
test_python changes were ported before.

These tests didn't pass in https://github.com/neovim/neovim/pull/9245