fix(runtime): stop treesitter highlight in b:undo_ftplugin (neovim#29533

)

It seems that nvim-treesitter stops treesitter highlight when changing
filetype, so it makes sense for builtin ftplugins to do this as well.

Use :call and v:lua here to allow separation with '|'.

NVIM v0.4.2

NVIM v0.4.1

NVIM v0.4.2

This is a "stub" release to fix release automation.

Release notes: e2cc5fe

FIXES:

6c65f8f CI/AppVeyor: revert whitelist

NVIM v0.4.0

NVIM v0.3.8

NVIM v0.3.7

NVIM v0.3.6

NVIM v0.3.5

Maintenance release to fix issues found in v0.3.4.

FIXES:

f891131 neovim#9894 options: properly reset directories on 'autochdir'
9a5488c Remove MSVC optimization workaround for SHM_ALL
1793ba8 Make SHM_ALL to a variable instead of a compound literal #define
947069b doc: mention "pynvim" module rename
46c7e12 neovim#9629 screen: don't crash when drawing popupmenu with 'rightleft' option
f1843c0 vim-patch:8.1.0677: look-behind match may use the wrong line number
1204421 neovim#8325 :terminal : set topline based on window height
aaa8c3d neovim#9504 :recover : Fix crash on non-existent *.swp

NVIM v0.3.4