Format ui tests with rustfmt

`rustfmt tests/ui/*.rs`

tests/ui/from-backtrace-backtrace.rs

@@ -5,6 +5,11 @@ use thiserror::Error;
 
 #[derive(Error, Debug)]
 #[error("...")]
-pub struct Error(#[from] #[backtrace] std::io::Error, Backtrace);
+pub struct Error(
+    #[from]
+    #[backtrace]
+    std::io::Error,
+    Backtrace,
+);
 
 fn main() {}

tests/ui/from-backtrace-backtrace.stderr

@@ -1,5 +1,5 @@
 error: deriving From requires no fields other than source and backtrace
- --> tests/ui/from-backtrace-backtrace.rs:8:18
+ --> tests/ui/from-backtrace-backtrace.rs:9:5
   |
-8 | pub struct Error(#[from] #[backtrace] std::io::Error, Backtrace);
-  |                  ^^^^^^^
+9 |     #[from]
+  |     ^^^^^^^

tests/ui/source-enum-not-error.rs

@@ -6,9 +6,7 @@ pub struct NotError;
 #[derive(Error, Debug)]
 #[error("...")]
 pub enum ErrorEnum {
-    Broken {
-        source: NotError,
-    },
+    Broken { source: NotError },
 }
 
 fn main() {}

tests/ui/source-enum-not-error.stderr

@@ -1,22 +1,22 @@
 error[E0599]: the method `as_dyn_error` exists for reference `&NotError`, but its trait bounds were not satisfied
-  --> tests/ui/source-enum-not-error.rs:10:9
-   |
-4  | pub struct NotError;
-   | -------------------
-   | |
-   | doesn't satisfy `NotError: AsDynError<'_>`
-   | doesn't satisfy `NotError: std::error::Error`
+ --> tests/ui/source-enum-not-error.rs:9:14
+  |
+4 | pub struct NotError;
+  | -------------------
+  | |
+  | doesn't satisfy `NotError: AsDynError<'_>`
+  | doesn't satisfy `NotError: std::error::Error`
 ...
-10 |         source: NotError,
-   |         ^^^^^^ method cannot be called on `&NotError` due to unsatisfied trait bounds
-   |
-   = note: the following trait bounds were not satisfied:
-           `NotError: std::error::Error`
-           which is required by `NotError: AsDynError<'_>`
-           `&NotError: std::error::Error`
-           which is required by `&NotError: AsDynError<'_>`
+9 |     Broken { source: NotError },
+  |              ^^^^^^ method cannot be called on `&NotError` due to unsatisfied trait bounds
+  |
+  = note: the following trait bounds were not satisfied:
+          `NotError: std::error::Error`
+          which is required by `NotError: AsDynError<'_>`
+          `&NotError: std::error::Error`
+          which is required by `&NotError: AsDynError<'_>`
 note: the trait `std::error::Error` must be implemented
-  --> $RUST/core/src/error.rs
-   |
-   | pub trait Error: Debug + Display {
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+ --> $RUST/core/src/error.rs
+  |
+  | pub trait Error: Debug + Display {
+  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/ui/transparent-enum-not-error.rs

@@ -3,9 +3,7 @@ use thiserror::Error;
 #[derive(Error, Debug)]
 pub enum Error {
     #[error(transparent)]
-    Other {
-        message: String,
-    }
+    Other { message: String },
 }
 
 fn main() {}