[libc++] Format the code base (#74334)

This patch runs clang-format on all of libcxx/include and libcxx/src, in
accordance with the RFC discussed at [1]. Follow-up patches will format
the benchmarks, the test suite and remaining parts of the code. I'm
splitting this one into its own patch so the diff is a bit easier to
review.

This patch was generated with:

   find libcxx/include libcxx/src -type f \
      | grep -v 'module.modulemap.in' \
      | grep -v 'CMakeLists.txt' \
      | grep -v 'README.txt' \
      | grep -v 'libcxx.imp' \
      | grep -v '__config_site.in' \
      | xargs clang-format -i

A Git merge driver is available in libcxx/utils/clang-format-merge-driver.sh
to help resolve merge and rebase issues across these formatting changes.

[1]: https://discourse.llvm.org/t/rfc-clang-formatting-all-of-libc-once-and-for-all

1 files changed, 7 insertions, 13 deletions

diff --git a/libcxx/src/mutex_destructor.cpp b/libcxx/src/mutex_destructor.cpp
index 5f06370..d5ac257 100644
--- a/libcxx/src/mutex_destructor.cpp
+++ b/libcxx/src/mutex_destructor.cpp
@@ -26,23 +26,17 @@
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 #ifdef NEEDS_MUTEX_DESTRUCTOR
-class _LIBCPP_EXPORTED_FROM_ABI mutex
-{
-    __libcpp_mutex_t __m_ = _LIBCPP_MUTEX_INITIALIZER;
+class _LIBCPP_EXPORTED_FROM_ABI mutex {
+  __libcpp_mutex_t __m_ = _LIBCPP_MUTEX_INITIALIZER;
 
 public:
-    _LIBCPP_ALWAYS_INLINE _LIBCPP_HIDE_FROM_ABI
-    constexpr mutex() = default;
-    mutex(const mutex&) = delete;
-    mutex& operator=(const mutex&) = delete;
-    ~mutex() noexcept;
+  _LIBCPP_ALWAYS_INLINE _LIBCPP_HIDE_FROM_ABI constexpr mutex() = default;
+  mutex(const mutex&)                                           = delete;
+  mutex& operator=(const mutex&)                                = delete;
+  ~mutex() noexcept;
 };
 
-
-mutex::~mutex() noexcept
-{
-    __libcpp_mutex_destroy(&__m_);
-}
+mutex::~mutex() noexcept { __libcpp_mutex_destroy(&__m_); }
 #endif // !NEEDS_MUTEX_DESTRUCTOR
 
 _LIBCPP_END_NAMESPACE_STD