runtime: Fix more typos (vim/vim#13354)

* Fix more typos

* Fix typos in ignored runtime/ directory

https://github.com/vim/vim/commit/dbf749bd5aaef6ea2d28bce081349785d174d96a

Co-authored-by: Viktor Szépe <viktor@szepe.net>

Update runtime files
https://github.com/vim/vim/commit/6c391a74fe90190796ca0b0c010112948a6e75d7

omit autoload/getscript.vim

skip doc/eval.txt (needs 8.2.2468)
skip doc/various.txt (needs 8.2.3400)

(typofixes courtesy of @dundargoc)

Update runtime files
https://github.com/vim/vim/commit/2c64ca1802b2c99b16d2fdf581b68b5baffb082a

Updated runtime files.

https://github.com/vim/vim/commit/dc08328821a2c11e33dfb1980332e4923ec64fca

NA patches:
vim-patch:8.0.0028
vim-patch:8.0.0029
vim-patch:8.0.0030

Updated runtime files.

https://github.com/vim/vim/commit/3e496b0ea31996b665824f45664dee1fdd73c4d0

NA patches:
vim-patch:8.0.0015
vim-patch:8.0.0016
vim-patch:177778575148

Correct optwin script, update PHP complete.

https://github.com/vim/vim/commit/dd1616e6cedf798a5e6db3bf8cec1fc79a0481d0

Updated runtime files.

https://github.com/vim/vim/commit/86ae720d7567fcbbe40f00cf136c797953f21038

More updated runtime files.

https://github.com/vim/vim/commit/83d1b19015219c7799af0a0d539ae86a41057240

Left out:
- doc/tags
- doc/todo.txt
- runtime/tutor/de.*
- runtime/syntax/vim.vim that seems to have already been
  applied/autogenerated without the has(...) tests

Update a few runtime files.

https://github.com/vim/vim/commit/f3c2afb77f8b1f2591337fcaa90ba0fb45365cbc

Update runtime files.

https://code.google.com/p/vim/source/detail?r=5d89d9b40499059e1a64dc35fbae94313fba0098