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_syntax/src/validation/block.rs

@@ -1,7 +1,8 @@
-use crate::{SyntaxKind::*,
-    ast::{self, AttrsOwner, AstNode},
+use crate::{
+    ast::{self, AstNode, AttrsOwner},
     SyntaxError,
     SyntaxErrorKind::*,
+    SyntaxKind::*,
 };
 
 pub(crate) fn validate_block_node(node: &ast::Block, errors: &mut Vec<SyntaxError>) {

crates/ra_syntax/src/validation/field_expr.rs

@@ -1,6 +1,7 @@
-use crate::{ast::{self, FieldKind},
-            SyntaxError,
-            SyntaxErrorKind::*,
+use crate::{
+    ast::{self, FieldKind},
+    SyntaxError,
+    SyntaxErrorKind::*,
 };
 
 pub(crate) fn validate_field_expr_node(node: &ast::FieldExpr, errors: &mut Vec<SyntaxError>) {

crates/ra_syntax/src/validation/unescape.rs

@@ -7,8 +7,8 @@
 //!
 //! Hopefully, we'll share this code in a proper way some day
 
-use std::str::Chars;
 use std::ops::Range;
+use std::str::Chars;
 
 #[derive(Debug, PartialEq, Eq, Clone, Hash)]
 pub enum EscapeError {