Update to the latest stable rustfmt, 0.4.2-stable (febbb36 2018-04-12).

lib/filetests/src/lib.rs

@@ -9,9 +9,13 @@
         type_complexity,
 // Rustfmt 0.9.0 is at odds with this lint:
         block_in_if_condition_stmt))]
-#![cfg_attr(feature = "cargo-clippy",
-            warn(mut_mut, nonminimal_bool, option_map_unwrap_or, option_map_unwrap_or_else,
-                 unicode_not_nfc, use_self))]
+#![cfg_attr(
+    feature = "cargo-clippy",
+    warn(
+        mut_mut, nonminimal_bool, option_map_unwrap_or, option_map_unwrap_or_else, unicode_not_nfc,
+        use_self
+    )
+)]
 
 #[macro_use(dbg)]
 extern crate cretonne_codegen;

lib/filetests/src/runone.rs

@@ -6,8 +6,8 @@ use cretonne_codegen::print_errors::pretty_verifier_error;
 use cretonne_codegen::settings::Flags;
 use cretonne_codegen::timing;
 use cretonne_codegen::verify_function;
-use cretonne_reader::IsaSpec;
 use cretonne_reader::parse_test;
+use cretonne_reader::IsaSpec;
 use std::borrow::Cow;
 use std::fs;
 use std::io::{self, Read};

lib/filetests/src/test_domtree.rs

@@ -14,8 +14,8 @@
 
 use cretonne_codegen::dominator_tree::{DominatorTree, DominatorTreePreorder};
 use cretonne_codegen::flowgraph::ControlFlowGraph;
-use cretonne_codegen::ir::Function;
 use cretonne_codegen::ir::entities::AnyEntity;
+use cretonne_codegen::ir::Function;
 use cretonne_reader::TestCommand;
 use match_directive::match_directive;
 use std::borrow::{Borrow, Cow};