[gcc r16-156] libstdc++: Use markdown in some Doxygen comments

[Jonathan Wakely]

https://gcc.gnu.org/g:c0136555e9974383a0a2256987d24bfbae2f2c10

commit r16-156-gc0136555e9974383a0a2256987d24bfbae2f2c10
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Apr 25 16:14:19 2025 +0100

    libstdc++: Use markdown in some Doxygen comments
    
    libstdc++-v3/ChangeLog:
    
            * include/bits/ptr_traits.h (to_address): Use markdown for
            formatting in Doxygen comments.

Diff:
---
 libstdc++-v3/include/bits/ptr_traits.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/libstdc++-v3/include/bits/ptr_traits.h b/libstdc++-v3/include/bits/ptr_traits.h
index d3c176524268..4308669e03b7 100644
--- a/libstdc++-v3/include/bits/ptr_traits.h
+++ b/libstdc++-v3/include/bits/ptr_traits.h
@@ -223,7 +223,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   /**
    * @brief Obtain address referenced by a pointer to an object
    * @param __ptr A pointer to an object
-   * @return @c __ptr
+   * @return `__ptr`
    * @ingroup pointer_abstractions
   */
   template<typename _Tp>
@@ -239,8 +239,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   /**
    * @brief Obtain address referenced by a pointer to an object
    * @param __ptr A pointer to an object
-   * @return @c pointer_traits<_Ptr>::to_address(__ptr) if that expression is
-             well-formed, otherwise @c to_address(__ptr.operator->())
+   * @return `pointer_traits<_Ptr>::to_address(__ptr)` if that expression is
+   *         well-formed, otherwise `to_address(__ptr.operator->())`.
    * @ingroup pointer_abstractions
   */
   template<typename _Ptr>