Update clang-format to version 21

Author: vitaut

.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/color.h

@@ -155,7 +155,7 @@ enum class color : uint32_t {
   white_smoke = 0xF5F5F5,              // rgb(245,245,245)
   yellow = 0xFFFF00,                   // rgb(255,255,0)
   yellow_green = 0x9ACD32              // rgb(154,205,50)
-};                                     // enum class color
+};  // enum class color
 
 enum class terminal_color : uint8_t {
   black = 30,