This requires removing the "Inner expression should be aligned" rule
from clint as it prevents essentially any formatting regarding ternary
operators.

We already have an extensive suite of static analysis tools we use,
which causes a fair bit of redundancy as we get duplicate warnings. PVS
is also prone to give false warnings which creates a lot of work to
identify and disable.

long is 32 bits on windows, while it is 64 bits on other architectures.
This makes the type suboptimal for a codebase meant to be
cross-platform. Replace it with more appropriate integer types.

Problem:    Handling new value of an option has a long "else if" chain.
Solution:   Use a function pointer. (Yegappan Lakshmanan, closes vim/vim#12015)

https://github.com/vim/vim/commit/af93691b53f38784efce0b93fe7644c44a7e382e

Notable changes: replace all infinite loops to `while(true)` and remove
`int` from `unsigned int`.

Work on https://github.com/neovim/neovim/issues/459

Allow Include What You Use to remove unnecessary includes and only
include what is necessary. This helps with reducing compilation times
and makes it easier to visualise which dependencies are actually
required.

Work on https://github.com/neovim/neovim/issues/549, but doesn't close
it since this only works fully for .c files and not headers.