Fix miri tests

Author: estebank

src/tools/miri/tests/fail-dep/concurrency/windows_join_self.stderr

@@ -24,8 +24,7 @@ LL | /     thread::spawn(|| {
 LL | |         unsafe {
 LL | |             let native = GetCurrentThread();
 LL | |             assert_eq!(WaitForSingleObject(native, INFINITE), WAIT_OBJECT_0);
-LL | |         }
-LL | |     })
+...  |
 LL | |     .join()
    | |___________^
 

src/tools/miri/tests/fail/function_calls/arg_inplace_mutate.stack.stderr

@@ -14,7 +14,6 @@ LL | |         let _unit: ();
 LL | |         {
 LL | |             let non_copy = S(42);
 ...  |
-LL | |         }
 LL | |     }
    | |_____^
 help: <TAG> is this argument

src/tools/miri/tests/fail/function_calls/arg_inplace_mutate.tree.stderr

@@ -16,7 +16,6 @@ LL | |         let _unit: ();
 LL | |         {
 LL | |             let non_copy = S(42);
 ...  |
-LL | |         }
 LL | |     }
    | |_____^
 help: the protected tag <TAG> was created here, in the initial state Reserved

src/tools/miri/tests/fail/function_calls/arg_inplace_observe_during.stack.stderr

@@ -14,7 +14,6 @@ LL | |         let _unit: ();
 LL | |         {
 LL | |             let non_copy = S(42);
 ...  |
-LL | |
 LL | |     }
    | |_____^
 help: <TAG> is this argument

src/tools/miri/tests/fail/function_calls/arg_inplace_observe_during.tree.stderr

@@ -16,7 +16,6 @@ LL | |         let _unit: ();
 LL | |         {
 LL | |             let non_copy = S(42);
 ...  |
-LL | |
 LL | |     }
    | |_____^
 help: the protected tag <TAG> was created here, in the initial state Reserved

src/tools/miri/tests/fail/function_calls/return_pointer_aliasing_read.stack.stderr

@@ -14,7 +14,6 @@ LL | |         {
 LL | |             let x = 0;
 LL | |             let ptr = &raw mut x;
 ...  |
-LL | |         }
 LL | |     }
    | |_____^
 help: <TAG> is this argument

src/tools/miri/tests/fail/function_calls/return_pointer_aliasing_read.tree.stderr

@@ -16,7 +16,6 @@ LL | |         {
 LL | |             let x = 0;
 LL | |             let ptr = &raw mut x;
 ...  |
-LL | |         }
 LL | |     }
    | |_____^
 help: the protected tag <TAG> was created here, in the initial state Reserved

src/tools/miri/tests/fail/function_calls/return_pointer_aliasing_write.stack.stderr

@@ -14,7 +14,6 @@ LL | |         {
 LL | |             let _x = 0;
 LL | |             let ptr = &raw mut _x;
 ...  |
-LL | |         }
 LL | |     }
    | |_____^
 help: <TAG> is this argument

src/tools/miri/tests/fail/function_calls/return_pointer_aliasing_write.tree.stderr

@@ -16,7 +16,6 @@ LL | |         {
 LL | |             let _x = 0;
 LL | |             let ptr = &raw mut _x;
 ...  |
-LL | |         }
 LL | |     }
    | |_____^
 help: the protected tag <TAG> was created here, in the initial state Reserved

src/tools/miri/tests/fail/function_calls/return_pointer_aliasing_write_tail_call.stack.stderr

@@ -14,7 +14,6 @@ LL | |         {
 LL | |             let _x = 0;
 LL | |             let ptr = &raw mut _x;
 ...  |
-LL | |         }
 LL | |     }
    | |_____^
 help: <TAG> is this argument