Block copy and paste from system-clipboard currently breaks formatting.
This fixes it.

The bug occurs because system-clipboard doesn't contain information
about what mode the copy was made.
Simple solution to this is we keep a cache of copy we last made along
with mode information. If system-clipboard returns the cache we apply
the mode information that we know about that cache.

Problem:    Cannot recognize elixir files.
Solution:   Recognize Elixir-specific files.  Check if an .ex file is Euphoria
            or Elixir. (Austin Gatlin, closes vim/vim#8401, closes vim/vim#8446)
https://github.com/vim/vim/commit/f3caeb63d62c08b579e9b5f40b35e8bf64dde87a

Python 3.3 reached its end-of-life 2017-09-29:

  https://www.python.org/dev/peps/pep-0398

Closes https://github.com/neovim/neovim/issues/14586

Certain values of 'wildignore', .e.g `*/node_modules/**`, would make the
provider checks not find the right executables.

Fixes https://github.com/neovim/neovim/issues/14388

It targets Vim 8.2 without feature and version checks.

Update runtime files
https://github.com/vim/vim/commit/4c295027a426986566cd7a76c47a6d3a529727e7

Update runtime files.
https://github.com/vim/vim/commit/9faec4e3d439968e21ad74e917aebb289df8f849

Omit vim9.

Update runtime files
https://github.com/vim/vim/commit/942db23c9cb7532d68048530d749eb84ca94d0cd

Omit po files.

Update runtime files
https://github.com/vim/vim/commit/4466ad6baa22485abb1147aca3340cced4778a66

Omit vim9 references in autocmd.txt.
Omit matchfuzzypos().

Update runtime files.
https://github.com/vim/vim/commit/cb80aa2d53e56d3aba3b3c439fb467f29a750c5e

Omit runtime/doc/tabpage.txt.
Patch v8.2.1401 is not ported yet.

Port optwin.vim changes without gettext().
Patch v8.2.1544 is not ported yet.