Update clang-format to version 21

.github/workflows/lint.yml

@@ -18,11 +18,11 @@ jobs:
     - name: Install clang-format
       run: |
         wget https://apt.llvm.org/llvm.sh
-        sudo bash ./llvm.sh 17
-        sudo apt install clang-format-17
+        sudo bash ./llvm.sh 21
+        sudo apt install clang-format-21
 
     - name: Run clang-format
       run: |
         find include src -name '*.h' -o -name '*.cc' | \
-          xargs clang-format-17 -i -style=file -fallback-style=none
+          xargs clang-format-21 -i -style=file -fallback-style=none
         git diff --exit-code

include/fmt/base.h

@@ -1850,8 +1850,7 @@ template <typename T> class buffer {
 #if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1940
   FMT_CONSTEXPR20
 #endif
-      void
-      append(const U* begin, const U* end) {
+      void append(const U* begin, const U* end) {
     while (begin != end) {
       auto size = size_;
       auto free_cap = capacity_ - size;

include/fmt/format.h

@@ -493,8 +493,8 @@ template <typename OutputIt,
 #if FMT_CLANG_VERSION >= 307 && !FMT_ICC_VERSION
 __attribute__((no_sanitize("undefined")))
 #endif
-FMT_CONSTEXPR20 inline auto
-reserve(OutputIt it, size_t n) -> typename OutputIt::value_type* {
+FMT_CONSTEXPR20 inline auto reserve(OutputIt it, size_t n) ->
+    typename OutputIt::value_type* {
   auto& c = get_container(it);
   size_t size = c.size();
   c.resize(size + n);

include/fmt/ostream.h

@@ -38,7 +38,7 @@ namespace detail {
 namespace {
 struct file_access_tag {};
 }  // namespace
-template <typename Tag, typename BufType, FILE* BufType::*FileMemberPtr>
+template <typename Tag, typename BufType, FILE* BufType::* FileMemberPtr>
 class file_access {
   friend auto get_file(BufType& obj) -> FILE* { return obj.*FileMemberPtr; }
 };