Update rustfmt configuration

In this change I went through all current rustfmt configuration options
and expanded our existing configuration with overrides whenever deemed
appropriate.

The `normalize_doc_attributes` option is still unstable, but seems to
work without any issues. Even when passing macros like `include_str!`
that is recognized properly and not normalized. So while this wasn't an
issue anywhere in the code, it should make sure it never will be.

When it comes to imports there are two new major additions. The
`imports_granularity` and `group_imports` options. Both mostly just
incorporate unwritten rules that have existed in Alacritty for a long
time. Unfortunately since `alacritty_terminal` imports in `alacritty`
are supposed to be separate blocks, the `group_imports` option cannot be
used.

1 files changed, 1 insertions, 2 deletions

diff --git a/alacritty/src/cli.rs b/alacritty/src/cli.rs
index a1480807..b1e12007 100644
--- a/alacritty/src/cli.rs
+++ b/alacritty/src/cli.rs
@@ -7,9 +7,8 @@ use structopt::StructOpt;
 
 use alacritty_terminal::config::Program;
 
-use crate::config::serde_utils;
 use crate::config::window::{Class, DEFAULT_NAME};
-use crate::config::Config;
+use crate::config::{serde_utils, Config};
 
 /// Options specified on the command line.
 #[derive(StructOpt, Debug)]