Make obligation cause code suggestions verbose

```
error[E0277]: `()` is not a future
  --> $DIR/unnecessary-await.rs:28:10
   |
LL |     e!().await;
   |          ^^^^^ `()` is not a future
   |
   = help: the trait `Future` is not implemented for `()`
   = note: () must be a future or must implement `IntoFuture` to be awaited
   = note: required for `()` to implement `IntoFuture`
help: remove the `.await`
   |
LL -     e!().await;
LL +     e!();
   |
```
```
error[E0277]: the trait bound `String: Copy` is not satisfied
  --> $DIR/const-fn-in-vec.rs:1:47
   |
LL | static _MAYBE_STRINGS: [Option<String>; 5] = [None; 5];
   |                                               ^^^^ the trait `Copy` is not implemented for `String`
   |
   = note: required for `Option<String>` to implement `Copy`
   = note: the `Copy` trait is required because this value will be copied for each element of the array
help: create an inline `const` block
   |
LL | static _MAYBE_STRINGS: [Option<String>; 5] = [const { None }; 5];
   |                                               +++++++      +
```

4 files changed, 29 insertions, 20 deletions

diff --git a/tests/ui/async-await/debug-ice-attempted-to-add-with-overflow.stderr b/tests/ui/async-await/debug-ice-attempted-to-add-with-overflow.stderr
index 8c9d06c79ca..40d44db205f 100644
--- a/tests/ui/async-await/debug-ice-attempted-to-add-with-overflow.stderr
+++ b/tests/ui/async-await/debug-ice-attempted-to-add-with-overflow.stderr
@@ -2,14 +2,16 @@ error[E0277]: `[usize; usize::MAX]` is not a future
   --> $DIR/debug-ice-attempted-to-add-with-overflow.rs:8:37
    |
 LL |     [0usize; 0xffff_ffff_ffff_ffff].await;
-   |                                    -^^^^^
-   |                                    ||
-   |                                    |`[usize; usize::MAX]` is not a future
-   |                                    help: remove the `.await`
+   |                                     ^^^^^ `[usize; usize::MAX]` is not a future
    |
    = help: the trait `Future` is not implemented for `[usize; usize::MAX]`
    = note: [usize; usize::MAX] must be a future or must implement `IntoFuture` to be awaited
    = note: required for `[usize; usize::MAX]` to implement `IntoFuture`
+help: remove the `.await`
+   |
+LL -     [0usize; 0xffff_ffff_ffff_ffff].await;
+LL +     [0usize; 0xffff_ffff_ffff_ffff];
+   |
 
 error[E0752]: `main` function is not allowed to be `async`
   --> $DIR/debug-ice-attempted-to-add-with-overflow.rs:6:1
diff --git a/tests/ui/async-await/drop-track-bad-field-in-fru.stderr b/tests/ui/async-await/drop-track-bad-field-in-fru.stderr
index 721e0106293..644a7c7717c 100644
--- a/tests/ui/async-await/drop-track-bad-field-in-fru.stderr
+++ b/tests/ui/async-await/drop-track-bad-field-in-fru.stderr
@@ -10,14 +10,16 @@ error[E0277]: `Option<_>` is not a future
   --> $DIR/drop-track-bad-field-in-fru.rs:6:46
    |
 LL |     None { value: (), ..Default::default() }.await;
-   |                                             -^^^^^
-   |                                             ||
-   |                                             |`Option<_>` is not a future
-   |                                             help: remove the `.await`
+   |                                              ^^^^^ `Option<_>` is not a future
    |
    = help: the trait `Future` is not implemented for `Option<_>`
    = note: Option<_> must be a future or must implement `IntoFuture` to be awaited
    = note: required for `Option<_>` to implement `IntoFuture`
+help: remove the `.await`
+   |
+LL -     None { value: (), ..Default::default() }.await;
+LL +     None { value: (), ..Default::default() };
+   |
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/async-await/issue-101715.stderr b/tests/ui/async-await/issue-101715.stderr
index f6af15c00d6..87302dce130 100644
--- a/tests/ui/async-await/issue-101715.stderr
+++ b/tests/ui/async-await/issue-101715.stderr
@@ -2,14 +2,15 @@ error[E0277]: `()` is not a future
   --> $DIR/issue-101715.rs:11:10
    |
 LL |         .await
-   |         -^^^^^
-   |         ||
-   |         |`()` is not a future
-   |         help: remove the `.await`
+   |          ^^^^^ `()` is not a future
    |
    = help: the trait `Future` is not implemented for `()`
    = note: () must be a future or must implement `IntoFuture` to be awaited
    = note: required for `()` to implement `IntoFuture`
+help: remove the `.await`
+   |
+LL -         .await
+   |
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/async-await/unnecessary-await.stderr b/tests/ui/async-await/unnecessary-await.stderr
index 620370a6113..f60b4ecb990 100644
--- a/tests/ui/async-await/unnecessary-await.stderr
+++ b/tests/ui/async-await/unnecessary-await.stderr
@@ -23,14 +23,16 @@ error[E0277]: `()` is not a future
   --> $DIR/unnecessary-await.rs:28:10
    |
 LL |     e!().await;
-   |         -^^^^^
-   |         ||
-   |         |`()` is not a future
-   |         help: remove the `.await`
+   |          ^^^^^ `()` is not a future
    |
    = help: the trait `Future` is not implemented for `()`
    = note: () must be a future or must implement `IntoFuture` to be awaited
    = note: required for `()` to implement `IntoFuture`
+help: remove the `.await`
+   |
+LL -     e!().await;
+LL +     e!();
+   |
 
 error[E0277]: `()` is not a future
   --> $DIR/unnecessary-await.rs:22:15
@@ -53,14 +55,16 @@ error[E0277]: `()` is not a future
   --> $DIR/unnecessary-await.rs:36:20
    |
 LL |     for x in [] {}.await
-   |                   -^^^^^
-   |                   ||
-   |                   |`()` is not a future
-   |                   help: remove the `.await`
+   |                    ^^^^^ `()` is not a future
    |
    = help: the trait `Future` is not implemented for `()`
    = note: () must be a future or must implement `IntoFuture` to be awaited
    = note: required for `()` to implement `IntoFuture`
+help: remove the `.await`
+   |
+LL -     for x in [] {}.await
+LL +     for x in [] {}
+   |
 
 error: aborting due to 4 previous errors