<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/108434>108434</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            clang-format changed output for template arguments in trailing return types
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang-format
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          ilya-biryukov
      </td>
    </tr>
</table>

<pre>
    After 438ad9f2bf25575c474313de4ad85a5da6f69e4c (found by bisecting), clang-format started producing a slightly different formatting in some cases with template arguments in trailing return types.

The new formatting does not necessarily look bad, but I wanted to understand if the new formatting is expected or not. I am not an expert in the intricacies of the various setting that clang-format has, so asking experts.
@owenca, could you let us know if you feel this is a regression or not?

cc @kadircet 
 
All examples are formatted `clang-format -style=google`

Input:
```cpp
template <typename F, typename... Args>
  requires internal::future::decayed_produces_co<F, Args...>
explicit Future(F&&, Args&&...) -> Future<
 internal::coroutine_result_type<std::decay_t<F>, std::decay_t<Args>...>>;
```

Expected (aka before)
```cpp
template <typename F, typename... Args>
  requires internal::future::decayed_produces_co<F, Args...>
explicit Future(F&&, Args&&...) -> Future<internal::coroutine_result_type<
 std::decay_t<F>, std::decay_t<Args>...>>;
```
Actual (aka after)
```cpp
template <typename F, typename... Args>
 requires internal::future::decayed_produces_co<F, Args...>
explicit Future(F&&, Args&&...) -> Future<
 internal::coroutine_result_type<std::decay_t<F>, std::decay_t<Args>...>>;
```

<hr>

And here's another more extreme example.
Expected (before):
```cpp
struct Foo {
 template <typename Adaptor>
  auto With(Adaptor&& adaptor) & -> status_internal::PurePolicy<
                                     Adaptor, StatusBuilder&> {}
};
```
Actual (after):
```cpp
struct Foo {
  template <typename Adaptor>
  auto With(Adaptor&& adaptor) & -> status_internal::PurePolicy<
      Adaptor, StatusBuilder&> {}
};
```
</pre>
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