style: rustfmt everything

This is why I was so intent on clearing the PR queue. This will
effectively invalidate all existing patches, so I wanted to start from a
clean slate.

We do make one little tweak: we put the default type definitions in
their own file and tell rustfmt to keep its grubby mits off of it. We
also sort it lexicographically and hopefully will enforce that from here
on.

grep-regex/src/multi.rs

@@ -1,5 +1,5 @@
 use aho_corasick::{AhoCorasick, AhoCorasickBuilder, MatchKind};
-use grep_matcher::{Matcher, Match, NoError};
+use grep_matcher::{Match, Matcher, NoError};
 use regex_syntax::hir::Hir;
 
 use error::Error;
@@ -93,15 +93,13 @@ pub fn alternation_literals(expr: &Hir) -> Option<Vec<Vec<u8>>> {
         _ => return None, // one literal isn't worth it
     };
 
-    let extendlit = |lit: &Literal, dst: &mut Vec<u8>| {
-        match *lit {
-            Literal::Unicode(c) => {
-                let mut buf = [0; 4];
-                dst.extend_from_slice(c.encode_utf8(&mut buf).as_bytes());
-            }
-            Literal::Byte(b) => {
-                dst.push(b);
-            }
+    let extendlit = |lit: &Literal, dst: &mut Vec<u8>| match *lit {
+        Literal::Unicode(c) => {
+            let mut buf = [0; 4];
+            dst.extend_from_slice(c.encode_utf8(&mut buf).as_bytes());
+        }
+        Literal::Byte(b) => {
+            dst.push(b);
         }
     };