Run rustfmt on `tests/codegen/`.

Except for `simd-intrinsic/`, which has a lot of files containing
multiple types like `u8x64` which really are better when hand-formatted.

There is a surprising amount of two-space indenting in this directory.

Non-trivial changes:
- `rustfmt::skip` needed in `debug-column.rs` to preserve meaning of the
  test.
- `rustfmt::skip` used in a few places where hand-formatting read more
  nicely: `enum/enum-match.rs`
- Line number adjustments needed for the expected output of
  `debug-column.rs` and `coroutine-debug.rs`.

1 files changed, 1 insertions, 2 deletions

diff --git a/tests/codegen/integer-overflow.rs b/tests/codegen/integer-overflow.rs
index 00780251bbc..a6407476fc2 100644
--- a/tests/codegen/integer-overflow.rs
+++ b/tests/codegen/integer-overflow.rs
@@ -2,7 +2,6 @@
 
 #![crate_type = "lib"]
 
-
 pub struct S1<'a> {
     data: &'a [u8],
     position: usize,
@@ -12,7 +11,7 @@ pub struct S1<'a> {
 #[no_mangle]
 pub fn slice_no_index_order<'a>(s: &'a mut S1, n: usize) -> &'a [u8] {
     // CHECK-NOT: slice_index_order_fail
-    let d = &s.data[s.position..s.position+n];
+    let d = &s.data[s.position..s.position + n];
     s.position += n;
     return d;
 }