allow rustfmt to reorder imports

This wasn't a right decision in the first place, the feature flag was
broken in the last rustfmt release, and syntax highlighting of imports
is more important anyway

crates/ra_tools/src/bin/pre-commit.rs

@@ -1,6 +1,6 @@
 use std::process::Command;
 
-use ra_tools::{Result, run_rustfmt, run, project_root, Overwrite};
+use ra_tools::{project_root, run, run_rustfmt, Overwrite, Result};
 
 fn main() -> Result<()> {
     run_rustfmt(Overwrite)?;

crates/ra_tools/src/lib.rs

@@ -1,10 +1,10 @@
 use std::{
-    fs,
     collections::HashMap,
+    error::Error,
+    fs,
+    io::{Error as IoError, ErrorKind},
     path::{Path, PathBuf},
     process::{Command, Output, Stdio},
-    io::{Error as IoError, ErrorKind},
-    error::Error
 };
 
 use itertools::Itertools;

crates/ra_tools/src/main.rs

@@ -1,10 +1,10 @@
 use clap::{App, SubCommand};
 use core::str;
 use ra_tools::{
-    generate, gen_tests, install_format_hook, run, run_with_output, run_rustfmt,
-    Overwrite, Result, run_fuzzer, run_clippy,
+    gen_tests, generate, install_format_hook, run, run_clippy, run_fuzzer, run_rustfmt,
+    run_with_output, Overwrite, Result,
 };
-use std::{path::{PathBuf}, env};
+use std::{env, path::PathBuf};
 
 fn main() -> Result<()> {
     let matches = App::new("tasks")