https://git.ruby-lang.org/ruby.git/commit/?id=5107a6bf12

From 5107a6bf12e91b830acca044484ff123b6ac7f96 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=9C=E9=83=A8=E6=98=8C=E5=B9=B3?=
 <shyouhei@r...>
Date: Mon, 7 Jun 2021 16:48:29 +0900
Subject: include/ruby/backward/2/attributes.h: skip doxygen

These macros are for backwards compatibility.  No longer used in our
public header files.  People can safely forget about them.
[ci skip]
---
 include/ruby/backward/2/attributes.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/include/ruby/backward/2/attributes.h b/include/ruby/backward/2/attributes.h
index 1d90d6c..73acfc9 100644
--- a/include/ruby/backward/2/attributes.h
+++ b/include/ruby/backward/2/attributes.h
@@ -1,7 +1,6 @@ https://github.com/ruby/ruby/blob/trunk/include/ruby/backward/2/attributes.h#L1
 #ifndef RUBY_BACKWARD2_ATTRIBUTES_H                  /*-*-C++-*-vi:se ft=cpp:*/
 #define RUBY_BACKWARD2_ATTRIBUTES_H
 /**
- * @file
  * @author     Ruby developers <ruby-core@r...>
  * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
  *             Permission  is hereby  granted,  to  either redistribute  and/or
-- 
cgit v1.1


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