[clang] [clang][NFC] Add header comment for OSLog.cpp (PR #148537)

[Bogdan Vetrenko via cfe-commits]

https://github.com/bv2k4 created https://github.com/llvm/llvm-project/pull/148537

None

>From f2b29fa668d3d07bb52f45590c833eeaa13f928b Mon Sep 17 00:00:00 2001
From: Bogdan Vetrenko <b.vetrenko at yandex.ru>
Date: Sun, 13 Jul 2025 19:37:43 +0300
Subject: [PATCH] [clang][NFC] Add header comment for OSLog.cpp

Signed-off-by: Bogdan Vetrenko <b.vetrenko at yandex.ru>
---
 clang/lib/AST/OSLog.cpp | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/clang/lib/AST/OSLog.cpp b/clang/lib/AST/OSLog.cpp
index b777d4d65b84d..5e219c8cb511d 100644
--- a/clang/lib/AST/OSLog.cpp
+++ b/clang/lib/AST/OSLog.cpp
@@ -1,4 +1,16 @@
-// TODO: header template
+//===--- OSLog.cpp - OS log format string analysis ------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file implements analysis functions for OS Log format strings and
+/// buffer layout computation for __builtin_os_log_format and related builtins.
+///
+//===----------------------------------------------------------------------===//
 
 #include "clang/AST/OSLog.h"
 #include "clang/AST/Attr.h"
@@ -137,8 +149,8 @@ class OSLogFormatStringHandler
     for (auto &Data : ArgsData) {
       if (!Data.MaskType.empty()) {
         CharUnits Size = CharUnits::fromQuantity(8);
-        Layout.Items.emplace_back(OSLogBufferItem::MaskKind, nullptr,
-                                  Size, 0, Data.MaskType);
+        Layout.Items.emplace_back(OSLogBufferItem::MaskKind, nullptr, Size, 0,
+                                  Data.MaskType);
       }
 
       if (Data.FieldWidth) {