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:    Reproducing memory access errors can be difficult.
Solution:   When testing, copy each line to allocated memory, so that valgrind
            can detect accessing memory before and/or after it.  Fix uncovered
            problems.

https://github.com/vim/vim/commit/fa4873ccfc10e0f278dc46f39d00136fab059b19

Since test_override() is N/A, enable ml_get_alloc_lines when ASAN is
enabled instead, so it also applies to functional tests.

Use xstrdup() to copy the line as ml_line_len looks hard to port.

Squash the test changes from patch 9.0.0016.

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

This feature has long been obsolete. The 'keymap' option can be used
to support language keymaps, including hebrew and hebrewp (phonetic
mapping). There is no need to keep the old c code with hardcoded
keymaps for some languages.

Problem:    Cannot cancel "gr" with Esc.
Solution:   Make "gr<Esc>" do nothing. (closes vim/vim#12064)

https://github.com/vim/vim/commit/4f026ea9f1ad9db262f0dba522768c84e5ae37b4

N/A patches for version.c:

vim-patch:9.0.1347: "gr CTRL-O" stays in Insert mode

Problem:    "gr CTRL-O" stays in Insert mode. (Pierre Ganty)
Solution:   Do not set restart_edit when "cmdchar" is 'v'. (closes vim/vim#12045)

https://github.com/vim/vim/commit/2824d1ee325ea61855c26f77e7a4e095b9606720

vim-patch:9.0.1349: "gr" with a count fails

Problem:    "gr" with a count fails.
Solution:   Break out of the loop only after using the count.

https://github.com/vim/vim/commit/3ddb1182b7b8d376e59b444f6b3e213f0dcd3417

Problem:    "gr CTRL-G" stays in virtual replace mode. (Pierre Ganty)
Solution:   Prepend CTRL-V before control characters. (closes vim/vim#12045)

https://github.com/vim/vim/commit/d6a4ea3aa0d3f4a886ea900e94bf4e8ca8ae8d63

Cherry-pick Test_edit_gr_special() from patch 9.0.1347.

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

Problem:    :setglobal cannot use script-local function for "expr" option.
Solution:   Use the pointer to the option value properly. (closes vim/vim#11883)

https://github.com/vim/vim/commit/01d4efe2e87632aa085897d3d64e27585908f977

Problem:    It is not easy to use a script-local function for an option.
Solution:   recognize s: and <SID> at the start of the expression. (Yegappan
            Lakshmanan, closes vim/vim#9401)

https://github.com/vim/vim/commit/8bb65f230d3025037f34021a72616038da0601ee

Omit duplicate docs in fold.txt: removed in a later runtime update.
Cherry-pick test_diffmode.vim changes from patch 8.2.1432.

Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>

Problem:    Edit test for mode message fails when using valgrind.
Solution:   Use WaitForAssert().  Run beep test later.

https://github.com/vim/vim/commit/c5382b667ac4b69ddff5b5bc562386843bc9c07b

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

Problem:    Some tests fail when run as root.
Solution:   Use CheckNotRoot.

https://github.com/vim/vim/commit/17709e280ac5ba234b04641cde88d38e3522cedf

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

Problem:    Tests fail when run as root.
Solution:   Add a comment mentioning the expected failure. (issue vim/vim#7919)

https://github.com/vim/vim/commit/f9a65505d1d93f3e67e5b8646bde3bbc44c70f7d

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