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, 1 deletions

diff --git a/tests/codegen/enum/enum-debug-niche.rs b/tests/codegen/enum/enum-debug-niche.rs
index 90de928bced..59e8b8a78b4 100644
--- a/tests/codegen/enum/enum-debug-niche.rs
+++ b/tests/codegen/enum/enum-debug-niche.rs
@@ -23,7 +23,12 @@
 #![allow(unused_variables)]
 #![allow(unused_assignments)]
 
-enum E { A, B, C, D(bool) }
+enum E {
+    A,
+    B,
+    C,
+    D(bool),
+}
 
 pub fn main() {
     let e = E::D(true);