Fixed multi-line comments

src/core/lib/gpr/posix/sync.cc

@@ -155,5 +155,5 @@ void gpr_once_init(gpr_once* once, void (*init_function)(void)) {
   GPR_ASSERT(pthread_once(once, init_function) == 0);
 }
 
-#endif  // defined(GPR_POSIX_SYNC) && !defined(GPR_ABSEIL_SYNC) && \
+#endif  // defined(GPR_POSIX_SYNC) && !defined(GPR_ABSEIL_SYNC) &&
        // !defined(GPR_CUSTOM_SYNC)

src/core/lib/gpr/windows/sync.cc

@@ -118,5 +118,5 @@ void gpr_once_init(gpr_once* once, void (*init_function)(void)) {
   InitOnceExecuteOnce(once, run_once_func, &arg, &phony);
 }
 
-#endif  // defined(GPR_WINDOWS) && !defined(GPR_ABSEIL_SYNC) && \
+#endif  // defined(GPR_WINDOWS) && !defined(GPR_ABSEIL_SYNC) &&
        // !defined(GPR_CUSTOM_SYNC)

src/core/lib/iomgr/grpc_if_nametoindex_posix.cc

@@ -39,5 +39,5 @@ uint32_t grpc_if_nametoindex(char* name) {
   return out;
 }
 
-#endif  // GRPC_IF_NAMETOINDEX == 1 && \
+#endif  // GRPC_IF_NAMETOINDEX == 1 &&
        // defined(GRPC_POSIX_SOCKET_IF_NAMETOINDEX)

src/core/lib/iomgr/grpc_if_nametoindex_unsupported.cc

@@ -35,5 +35,5 @@ uint32_t grpc_if_nametoindex(char* name) {
   return 0;
 }
 
-#endif  // GRPC_IF_NAMETOINDEX == 0 || \
+#endif  // GRPC_IF_NAMETOINDEX == 0 ||
        // !defined(GRPC_POSIX_SOCKET_IF_NAMETOINDEX)

test/core/security/credentials_test.cc

@@ -1944,7 +1944,7 @@ TEST(CredentialsTest, TestGetWellKnownGoogleCredentialsFilePath) {
   // so we set it to some fake value
   restore_home_env = true;
   SetEnv("HOME", "/fake/home/for/bazel");
-#endif  // defined(GRPC_BAZEL_BUILD) && (defined(GPR_POSIX_ENV) || \
+#endif  // defined(GRPC_BAZEL_BUILD) && (defined(GPR_POSIX_ENV) ||
        // defined(GPR_LINUX_ENV))
   std::string path = grpc_get_well_known_google_credentials_file_path();
   GPR_ASSERT(!path.empty());