Problem:    Using %S in printf() does not work correctly.
Solution:   Fix the problem and add more tests. (closes vim/vim#9208)
https://github.com/vim/vim/commit/1f2453fec6f8f0f315f00ca7b562a02090cb1e37

Problem:    Printf() with %S does not handle multi-byte correctly.
Solution:   Count cells instead of bytes. (closes vim/vim#9169, closes vim/vim#7486)
https://github.com/vim/vim/commit/d85fccdfed58108c4e0958d0b17c64690b5f073f

Problem:    More functions can be used as methods.
Solution:   Make various functions usable as a method.
https://github.com/vim/vim/commit/f6ed61e1489e40eada55a4f1782e1ed82bcad7d9

+sound is needed for sound_* functions.

Make swapinfo and swapname take exactly one argument.
Previously, they could erroneously take one or more.

Problem:    More functions can be used as methods.
Solution:   Make various functions usable as a method.
https://github.com/vim/vim/commit/aad222c9c9a1e4fe6ae5a1fe95bb084619be0e65

Partial port as this does not include eval.txt change for listener_add.

Cherry-pick eval.txt changes for:
- bufadd from v8.1.1626:
  https://github.com/vim/vim/commit/5ca1ac373ae62b37152cb6f85916b402eda520a5
- setloclist and setqflist headers from:
  https://github.com/vim/vim/commit/b0d45e7f5354375edd02afafde3bd37dac1515ff

Correct eval.txt typo for settabwinvar method call (matches latest Vim).

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

- filereadable(): requires v8.1.1378 for Test_delete_rf(), but there
                  appears to have been some trouble porting it. (#12784)

- confirm(): requires v8.1.0832 for Test_confirm() and v8.1.0815 for
             feedkeys()'s "L" flag.

             (I did attempt to port the test using nvim_input() instead,
             but seems that input handling for confirm() doesn't work in
             --headless mode?)

             Note that confirm() was actually added as a method in
             v8.1.1915.

Uncomment use of method call syntax in Test_Executable() previously
included instead from v8.2.2259.

Problem:    Obvious mistakes are accepted as valid expressions.
Solution:   Be more strict about parsing numbers. (Yasuhiro Matsumoto,
            closes vim/vim#3981)
https://github.com/vim/vim/commit/16e9b85113e0b354ece1cb4f5fcc7866850f3685

Update vim_str2nr_spec.lua to add more tests that use strict = true.

Problem:    "eval" after "if 0" doesn't check for following command.
Solution:   Add "eval" to list of commands that check for a following command.
            (closes vim/vim#5640)
https://github.com/vim/vim/commit/a76b31542e1d83b7d2fe7378439912e800a4d0f6

Problem:    Some errors are not covered by tests.
Solution:   Add a few more tests. (Dominique Pelle, closes vim/vim#5920)
https://github.com/vim/vim/commit/067297e16a516838dbc46aaa9d8b1a507afec28d

Problem:    The "num64" feature is available everywhere and building without
            it causes problems.
Solution:   Graduage the "num64" feature. (James McCoy, closes vim/vim#5650)
https://github.com/vim/vim/commit/82f654e092ac5b86316bc1b30c0b07a849813186

Restore Test_printf_spec_b() from patch 7.4.2221..

N/A patches for version.c:

vim-patch:8.2.0594: MS-Windows: cannot build with WINVER set to 0x0501

Problem:    MS-Windows: cannot build with WINVER set to 0x0501.
Solution:   Only use inet_ntop() when available. (Ozaki Kiichi, closes vim/vim#5946)
https://github.com/vim/vim/commit/b6fb0516ec862a18fdffe06c9400d507a7193835

vim-patch:8.2.0965: has_funcundefined() is not used

Problem:    Has_funcundefined() is not used.
Solution:   Delete the function. (Dominique Pellé, closes vim/vim#6242)
https://github.com/vim/vim/commit/5055c56cfbedc6326c607d40c7a1241682f7675e

vim-patch:8.2.1370: MS-Windows: warning for using fstat() with stat_T

Problem:    MS-Windows: warning for using fstat() with stat_T.
Solution:   use _fstat64() if available. (Naruhiko Nishino, closes vim/vim#6625)
https://github.com/vim/vim/commit/c753478b82613df37b145764e27f5514542edb97

vim-patch:8.2.2056: configure fails when building with implicit-function-declaration

Problem:    Configure fails when building with the
            "implicit-function-declaration" error enabled, specifically on Mac.
Solution:   Declear the functions like in the source code. (suggestion by
            Clemens Lang, closes vim/vim#7380)
https://github.com/vim/vim/commit/ce7be3a0e6f19bc85990bb8fcfe5e208944777b4

Problem:    Error for white space after expression in assignment.
Solution:   Skip over white space. (closes vim/vim#6617)
https://github.com/vim/vim/commit/6a25026262e2cdbbd8738361c5bd6ebef8862d87