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, 6 insertions, 2 deletions

diff --git a/tests/codegen/intrinsics/const_eval_select.rs b/tests/codegen/intrinsics/const_eval_select.rs
index c8debe8d711..baa985b00cd 100644
--- a/tests/codegen/intrinsics/const_eval_select.rs
+++ b/tests/codegen/intrinsics/const_eval_select.rs
@@ -6,10 +6,14 @@
 
 use std::intrinsics::const_eval_select;
 
-const fn foo(_: i32) -> i32 { 1 }
+const fn foo(_: i32) -> i32 {
+    1
+}
 
 #[no_mangle]
-pub fn hi(n: i32) -> i32 { n }
+pub fn hi(n: i32) -> i32 {
+    n
+}
 
 #[no_mangle]
 pub unsafe fn hey() {