Add more files to the clang format CI. (#1833)

.github/workflows/clang-format-check.yml

diff --git a/.github/workflows/clang-format-check.yml b/.github/workflows/clang-format-check.yml
index 2a27fd2..2fe917a 100644
--- a/.github/workflows/clang-format-check.yml
+++ b/.github/workflows/clang-format-check.yml
@@ -17,5 +17,5 @@
       - uses: RafikFarhad/clang-format-github-action@4a04d8e72a661766278abf214ed995bf6bdf0b8f # v3.2.0
         with:
           style: file
-          sources: "apps/*.c,apps/**/*.h,apps/**/*.c,examples/*.c,include/avif/*.h,src/*.c,tests/*.c,tests/**/*.h,tests/**/*.cc"
+          sources: "apps/*.c,apps/**/*.h,apps/**/*.c,apps/**/*.cc,examples/*.c,include/avif/*.h,src/*.c,tests/*.c,tests/**/*.h,tests/**/*.cc"
           excludes: "apps/shared/iccjpeg.h,apps/shared/iccjpeg.c"

apps/avifgainmaputil/tonemap_command.cc

diff --git a/apps/avifgainmaputil/tonemap_command.cc b/apps/avifgainmaputil/tonemap_command.cc
index 7c6a630..147ba68 100644
--- a/apps/avifgainmaputil/tonemap_command.cc
+++ b/apps/avifgainmaputil/tonemap_command.cc
@@ -129,9 +129,9 @@
   }
   if (cicp.transfer_characteristics ==
       AVIF_TRANSFER_CHARACTERISTICS_UNSPECIFIED) {
-    cicp.transfer_characteristics =
-        tone_mapping_to_hdr ? AVIF_TRANSFER_CHARACTERISTICS_PQ
-                            : AVIF_TRANSFER_CHARACTERISTICS_SRGB;
+    cicp.transfer_characteristics = tone_mapping_to_hdr
+                                        ? AVIF_TRANSFER_CHARACTERISTICS_PQ
+                                        : AVIF_TRANSFER_CHARACTERISTICS_SRGB;
   }
 
   // Determine output depth.

tests/gtest/avif_fuzztest_helpers.cc

diff --git a/tests/gtest/avif_fuzztest_helpers.cc b/tests/gtest/avif_fuzztest_helpers.cc
index e55094b..8333346 100644
--- a/tests/gtest/avif_fuzztest_helpers.cc
+++ b/tests/gtest/avif_fuzztest_helpers.cc
@@ -234,7 +234,7 @@
   // Use an environment variable to get the test data directory because
   // fuzztest seeds are created before the main() function is called, so the
   // test has no chance to parse command line arguments.
-  const std ::vector<std::string> test_data_dirs = GetSeedDataDirs();
+  const std::vector<std::string> test_data_dirs = GetSeedDataDirs();
   if (test_data_dirs.empty()) {
     // Only a warning because this can happen when running the binary with
     // --list_fuzz_tests (such as with gtest_discover_tests() in cmake).