libstdc++: Fix doxygen markup for group close commands

A change in Doxygen 1.8.16 means that "// @}" is no longer recognized by
Doxygen, so doesn't close a @{ group. A "///" comment needs to be used.

libstdc++-v3/ChangeLog:

	* include/bits/atomic_base.h: Fix doxygen group close.
	* include/bits/basic_ios.h: Likewise.
	* include/bits/forward_list.h: Likewise.
	* include/bits/fs_dir.h: Likewise.
	* include/bits/fs_ops.h: Likewise.
	* include/bits/fs_path.h: Likewise.
	* include/bits/functional_hash.h: Likewise.
	* include/bits/gslice.h: Likewise.
	* include/bits/gslice_array.h: Likewise.
	* include/bits/hashtable_policy.h: Likewise.
	* include/bits/indirect_array.h: Likewise.
	* include/bits/locale_classes.h: Likewise.
	* include/bits/locale_facets.h: Likewise.
	* include/bits/locale_facets_nonio.h: Likewise.
	* include/bits/mask_array.h: Likewise.
	* include/bits/refwrap.h: Likewise.
	* include/bits/regex.h: Likewise.
	* include/bits/regex_automaton.h: Likewise.
	* include/bits/regex_compiler.h: Likewise.
	* include/bits/regex_constants.h: Likewise.
	* include/bits/regex_error.h: Likewise.
	* include/bits/regex_executor.h: Likewise.
	* include/bits/regex_scanner.h: Likewise.
	* include/bits/shared_ptr.h: Likewise.
	* include/bits/shared_ptr_atomic.h: Likewise.
	* include/bits/shared_ptr_base.h: Likewise.
	* include/bits/slice_array.h: Likewise.
	* include/bits/specfun.h: Likewise.
	* include/bits/std_function.h: Likewise.
	* include/bits/std_mutex.h: Likewise.
	* include/bits/stl_deque.h: Likewise.
	* include/bits/stl_iterator.h: Likewise.
	* include/bits/stl_iterator_base_types.h: Likewise.
	* include/bits/stl_map.h: Likewise.
	* include/bits/stl_multimap.h: Likewise.
	* include/bits/stl_multiset.h: Likewise.
	* include/bits/stl_numeric.h: Likewise.
	* include/bits/stl_pair.h: Likewise.
	* include/bits/stl_set.h: Likewise.
	* include/bits/stl_uninitialized.h: Likewise.
	* include/bits/stream_iterator.h: Likewise.
	* include/bits/streambuf_iterator.h: Likewise.
	* include/bits/unique_ptr.h: Likewise.
	* include/bits/unordered_map.h: Likewise.
	* include/bits/unordered_set.h: Likewise.
	* include/decimal/decimal: Likewise.
	* include/experimental/any: Likewise.
	* include/experimental/array: Likewise.
	* include/experimental/bits/fs_dir.h: Likewise.
	* include/experimental/bits/fs_fwd.h: Likewise.
	* include/experimental/bits/fs_ops.h: Likewise.
	* include/experimental/bits/fs_path.h: Likewise.
	* include/experimental/buffer: Likewise.
	* include/experimental/internet: Likewise.
	* include/experimental/optional: Likewise.
	* include/experimental/propagate_const: Likewise.
	* include/experimental/socket: Likewise.
	* include/ext/pb_ds/assoc_container.hpp: Likewise.
	* include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp:
	Likewise.
	* include/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp: Likewise.
	* include/ext/pb_ds/detail/trie_policy/node_metadata_selector.hpp: Likewise.
	* include/ext/pb_ds/detail/types_traits.hpp: Likewise.
	* include/ext/pb_ds/exception.hpp: Likewise.
	* include/ext/pb_ds/priority_queue.hpp: Likewise.
	* include/ext/pb_ds/tag_and_trait.hpp: Likewise.
	* include/ext/random: Likewise.
	* include/std/any: Likewise.
	* include/std/atomic: Likewise.
	* include/std/bitset: Likewise.
	* include/std/chrono: Likewise.
	* include/std/complex: Likewise.
	* include/std/condition_variable: Likewise.
	* include/std/fstream: Likewise.
	* include/std/future: Likewise.
	* include/std/iostream: Likewise.
	* include/std/istream: Likewise.
	* include/std/mutex: Likewise.
	* include/std/numeric: Likewise.
	* include/std/ostream: Likewise.
	* include/std/ratio: Likewise.
	* include/std/shared_mutex: Likewise.
	* include/std/stdexcept: Likewise.
	* include/std/streambuf: Likewise.
	* include/std/system_error: Likewise.
	* include/std/thread: Likewise.
	* include/std/valarray: Likewise.
	* include/std/variant: Likewise.
	* include/tr1/cmath: Likewise.
	* include/tr1/regex: Likewise.
	* include/tr2/dynamic_bitset: Likewise.
	* libsupc++/atomic_lockfree_defines.h: Likewise.
	* libsupc++/exception: Likewise.
	* libsupc++/exception.h: Likewise.
	* libsupc++/exception_ptr.h: Likewise.
	* libsupc++/nested_exception.h: Likewise.

libstdc++-v3/ChangeLog:

	* include/tr1/regex:

21 files changed, 89 insertions, 89 deletions

diff --git a/libstdc++-v3/include/std/any b/libstdc++-v3/include/std/any
index 5c33716..391e433 100644
--- a/libstdc++-v3/include/std/any
+++ b/libstdc++-v3/include/std/any
@@ -488,7 +488,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	return static_cast<_ValueType>(std::move(*__p));
       __throw_bad_any_cast();
     }
-  // @}
+  /// @}
 
   /// @cond undocumented
   template<typename _Tp>
@@ -547,7 +547,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	  return static_cast<_ValueType*>(__any_caster<_ValueType>(__any));
       return nullptr;
     }
-  // @}
+  /// @}
 
   template<typename _Tp>
     void
diff --git a/libstdc++-v3/include/std/atomic b/libstdc++-v3/include/std/atomic
index de5591d..a77edcb 100644
--- a/libstdc++-v3/include/std/atomic
+++ b/libstdc++-v3/include/std/atomic
@@ -1637,7 +1637,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
 #endif // C++2a
 
-  // @} group atomics
+  /// @} group atomics
 
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
diff --git a/libstdc++-v3/include/std/bitset b/libstdc++-v3/include/std/bitset
index 5b4f370..be3bdd7 100644
--- a/libstdc++-v3/include/std/bitset
+++ b/libstdc++-v3/include/std/bitset
@@ -961,7 +961,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 #endif
 
       // 23.3.5.2 bitset operations:
-      //@{
+      ///@{
       /**
        *  Operations on bitsets.
        *  @param  __rhs  A same-sized bitset.
@@ -988,9 +988,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 	this->_M_do_xor(__rhs);
 	return *this;
       }
-      //@}
+      ///@}
 
-      //@{
+      ///@{
       /**
        *  Operations on bitsets.
        *  @param  __position  The number of places to shift.
@@ -1022,9 +1022,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 	  this->_M_do_reset();
 	return *this;
       }
-      //@}
+      ///@}
 
-      //@{
+      ///@{
       /**
        *  These versions of single-bit set, reset, flip, and test are
        *  extensions from the SGI version.  They do no range checking.
@@ -1065,7 +1065,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       _Unchecked_test(size_t __pos) const _GLIBCXX_NOEXCEPT
       { return ((this->_M_getword(__pos) & _Base::_S_maskbit(__pos))
 		!= static_cast<_WordT>(0)); }
-      //@}
+      ///@}
 
       // Set, reset, and flip.
       /**
@@ -1144,7 +1144,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       operator~() const _GLIBCXX_NOEXCEPT
       { return bitset<_Nb>(*this).flip(); }
 
-      //@{
+      ///@{
       /**
        *  @brief  Array-indexing support.
        *  @param  __position  Index into the %bitset.
@@ -1166,7 +1166,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       _GLIBCXX_CONSTEXPR bool
       operator[](size_t __position) const
       { return _Unchecked_test(__position); }
-      //@}
+      ///@}
 
       /**
        *  @brief Returns a numerical interpretation of the %bitset.
@@ -1300,7 +1300,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       size() const _GLIBCXX_NOEXCEPT
       { return _Nb; }
 
-      //@{
+      ///@{
       /// These comparisons for equality/inequality are, well, @e bitwise.
       bool
       operator==(const bitset<_Nb>& __rhs) const _GLIBCXX_NOEXCEPT
@@ -1311,7 +1311,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       operator!=(const bitset<_Nb>& __rhs) const _GLIBCXX_NOEXCEPT
       { return !this->_M_is_equal(__rhs); }
 #endif
-      //@}
+      ///@}
 
       /**
        *  @brief Tests the value of a bit.
@@ -1352,7 +1352,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       none() const _GLIBCXX_NOEXCEPT
       { return !this->_M_is_any(); }
 
-      //@{
+      ///@{
       /// Self-explanatory.
       bitset<_Nb>
       operator<<(size_t __position) const _GLIBCXX_NOEXCEPT
@@ -1361,7 +1361,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       bitset<_Nb>
       operator>>(size_t __position) const _GLIBCXX_NOEXCEPT
       { return bitset<_Nb>(*this) >>= __position; }
-      //@}
+      ///@}
 
       /**
        *  @brief  Finds the index of the first "on" bit.
@@ -1421,7 +1421,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       }
 
   // 23.3.5.3 bitset operations:
-  //@{
+  ///@{
   /**
    *  @brief  Global bitwise operations on bitsets.
    *  @param  __x  A bitset.
@@ -1456,9 +1456,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       __result ^= __y;
       return __result;
     }
-  //@}
+  ///@}
 
-  //@{
+  ///@{
   /**
    *  @brief Global I/O operators for bitsets.
    *
@@ -1548,7 +1548,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       __x._M_copy_to_string(__tmp, __ct.widen('0'), __ct.widen('1'));
       return __os << __tmp;
     }
-  //@}
+  ///@}
 
 _GLIBCXX_END_NAMESPACE_CONTAINER
 } // namespace std
diff --git a/libstdc++-v3/include/std/chrono b/libstdc++-v3/include/std/chrono
index 11729aa..4631a72 100644
--- a/libstdc++-v3/include/std/chrono
+++ b/libstdc++-v3/include/std/chrono
@@ -165,7 +165,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     struct common_type<chrono::time_point<_Clock, _Duration>>
     { using type = chrono::time_point<_Clock, _Duration>; };
 
-  // @} group chrono
+  /// @} group chrono
 
   namespace chrono
   {
@@ -1070,7 +1070,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 		 const time_point<_Clock, _Dur2>& __rhs)
       { return !(__lhs < __rhs); }
 
-    // @}
+    /// @}
 
     // Clocks.
 
@@ -3130,7 +3130,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       };
 #endif // C++20
 
-    // @}
+    /// @}
   } // namespace chrono
 
 #if __cplusplus > 201103L
diff --git a/libstdc++-v3/include/std/complex b/libstdc++-v3/include/std/complex
index b896b49..c2f6421 100644
--- a/libstdc++-v3/include/std/complex
+++ b/libstdc++-v3/include/std/complex
@@ -325,7 +325,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     }
 
   // Operators:
-  //@{
+  ///@{
   ///  Return new complex value @a x plus @a y.
   template<typename _Tp>
     inline _GLIBCXX20_CONSTEXPR complex<_Tp>
@@ -353,9 +353,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       __r += __x;
       return __r;
     }
-  //@}
+  ///@}
 
-  //@{
+  ///@{
   ///  Return new complex value @a x minus @a y.
   template<typename _Tp>
     inline _GLIBCXX20_CONSTEXPR complex<_Tp>
@@ -383,9 +383,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       __r += __x;
       return __r;
     }
-  //@}
+  ///@}
 
-  //@{
+  ///@{
   ///  Return new complex value @a x times @a y.
   template<typename _Tp>
     inline _GLIBCXX20_CONSTEXPR complex<_Tp>
@@ -413,9 +413,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       __r *= __x;
       return __r;
     }
-  //@}
+  ///@}
 
-  //@{
+  ///@{
   ///  Return new complex value @a x divided by @a y.
   template<typename _Tp>
     inline _GLIBCXX20_CONSTEXPR complex<_Tp>
@@ -443,7 +443,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       __r /= __y;
       return __r;
     }
-  //@}
+  ///@}
 
   ///  Return @a x.
   template<typename _Tp>
@@ -457,7 +457,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     operator-(const complex<_Tp>& __x)
     { return complex<_Tp>(-__x.real(), -__x.imag()); }
 
-  //@{
+  ///@{
   ///  Return true if @a x is equal to @a y.
   template<typename _Tp>
     inline _GLIBCXX_CONSTEXPR bool
@@ -474,9 +474,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     inline _GLIBCXX_CONSTEXPR bool
     operator==(const _Tp& __x, const complex<_Tp>& __y)
     { return __x == __y.real() && _Tp() == __y.imag(); }
-  //@}
+  ///@}
 
-  //@{
+  ///@{
   ///  Return false if @a x is equal to @a y.
   template<typename _Tp>
     inline _GLIBCXX_CONSTEXPR bool
@@ -493,7 +493,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     operator!=(const _Tp& __x, const complex<_Tp>& __y)
     { return __x != __y.real() || _Tp() != __y.imag(); }
 #endif
-  //@}
+  ///@}
 
   ///  Extraction operator for complex values.
   template<typename _Tp, typename _CharT, class _Traits>
@@ -1552,7 +1552,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 #endif
 #endif
 
-  // @} group complex_numbers
+  /// @} group complex_numbers
 
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
diff --git a/libstdc++-v3/include/std/condition_variable b/libstdc++-v3/include/std/condition_variable
index 230b85d..fb9b7d3 100644
--- a/libstdc++-v3/include/std/condition_variable
+++ b/libstdc++-v3/include/std/condition_variable
@@ -442,7 +442,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   } // end inline namespace
 
-  // @} group condition_variables
+  /// @} group condition_variables
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
diff --git a/libstdc++-v3/include/std/fstream b/libstdc++-v3/include/std/fstream
index 3d7aabc..30fab82 100644
--- a/libstdc++-v3/include/std/fstream
+++ b/libstdc++-v3/include/std/fstream
@@ -160,7 +160,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       bool                      _M_reading;
       bool                      _M_writing;
 
-      //@{
+      ///@{
       /**
        *  Necessary bits for putback buffer management.
        *
@@ -170,7 +170,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       char_type*		_M_pback_cur_save;
       char_type*		_M_pback_end_save;
       bool			_M_pback_init;
-      //@}
+      ///@}
 
       // Cached codecvt facet.
       const __codecvt_type* 	_M_codecvt;
diff --git a/libstdc++-v3/include/std/future b/libstdc++-v3/include/std/future
index ce55d2b..ef15fef 100644
--- a/libstdc++-v3/include/std/future
+++ b/libstdc++-v3/include/std/future
@@ -1774,7 +1774,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 #endif // _GLIBCXX_ASYNC_ABI_COMPAT
 #endif // _GLIBCXX_HAS_GTHREADS
 
-  // @} group futures
+  /// @} group futures
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
diff --git a/libstdc++-v3/include/std/iostream b/libstdc++-v3/include/std/iostream
index c4c2b42..119005d 100644
--- a/libstdc++-v3/include/std/iostream
+++ b/libstdc++-v3/include/std/iostream
@@ -56,7 +56,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
    *  startup and termination. For more information, see the section of the
    *  manual linked to above.
   */
-  //@{
+  ///@{
   extern istream cin;		/// Linked to standard input
   extern ostream cout;		/// Linked to standard output
   extern ostream cerr;		/// Linked to standard error (unbuffered)
@@ -68,7 +68,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   extern wostream wcerr;	/// Linked to standard error (unbuffered)
   extern wostream wclog;	/// Linked to standard error (buffered)
 #endif
-  //@}
+  ///@}
 
   // For construction of filebuffers for cout, cin, cerr, clog et. al.
   static ios_base::Init __ioinit;
diff --git a/libstdc++-v3/include/std/istream b/libstdc++-v3/include/std/istream
index 24235c9..1e5ebe4 100644
--- a/libstdc++-v3/include/std/istream
+++ b/libstdc++-v3/include/std/istream
@@ -107,7 +107,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       class sentry;
       friend class sentry;
 
-      //@{
+      ///@{
       /**
        *  @brief  Interface for manipulators.
        *
@@ -133,9 +133,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	__pf(*this);
 	return *this;
       }
-      //@}
+      ///@}
 
-      //@{
+      ///@{
       /**
        *  @name Extractors
        *
@@ -155,7 +155,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
        *  be rethrown if badbit is set in the exceptions mask.
       */
 
-      //@{
+      ///@{
       /**
        *  @brief  Integer arithmetic extractors
        *  @param  __n A variable of builtin integral type.
@@ -199,9 +199,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       operator>>(unsigned long long& __n)
       { return _M_extract(__n); }
 #endif
-      //@}
+      ///@}
 
-      //@{
+      ///@{
       /**
        *  @brief  Floating point arithmetic extractors
        *  @param  __f A variable of builtin floating point type.
@@ -221,7 +221,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       __istream_type&
       operator>>(long double& __f)
       { return _M_extract(__f); }
-      //@}
+      ///@}
 
       /**
        *  @brief  Basic arithmetic extractors
@@ -257,7 +257,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       */
       __istream_type&
       operator>>(__streambuf_type* __sb);
-      //@}
+      ///@}
 
       // [27.6.1.3] unformatted input
       /**
@@ -269,7 +269,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       gcount() const
       { return _M_gcount; }
 
-      //@{
+      ///@{
       /**
        *  @name Unformatted Input Functions
        *
@@ -600,7 +600,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       */
       __istream_type&
       seekg(off_type, ios_base::seekdir);
-      //@}
+      ///@}
 
     protected:
       basic_istream()
@@ -735,7 +735,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       { return _M_ok; }
     };
 
-  //@{
+  ///@{
   /**
    *  @brief  Character extractors
    *  @param  __in  An input stream.
@@ -760,7 +760,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     inline basic_istream<char, _Traits>&
     operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
     { return (__in >> reinterpret_cast<char&>(__c)); }
-  //@}
+  ///@}
 
 
   template<typename _CharT, typename _Traits>
@@ -769,7 +769,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   void __istream_extract(istream&, char*, streamsize);
 
-  //@{
+  ///@{
   /**
    *  @brief  Character string extractors
    *  @param  __in  An input stream.
@@ -852,7 +852,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     operator>>(basic_istream<char, _Traits>& __in, signed char (&__s)[_Num])
     { return __in >> reinterpret_cast<char(&)[_Num]>(__s); }
 #endif
-  //@}
+  ///@}
 
   /**
    *  @brief  Template class basic_iostream
diff --git a/libstdc++-v3/include/std/mutex b/libstdc++-v3/include/std/mutex
index b6a5952..d4c5d13 100644
--- a/libstdc++-v3/include/std/mutex
+++ b/libstdc++-v3/include/std/mutex
@@ -884,7 +884,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     }
 #endif // _GLIBCXX_HAS_GTHREADS
 
-  // @} group mutexes
+  /// @} group mutexes
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
diff --git a/libstdc++-v3/include/std/numeric b/libstdc++-v3/include/std/numeric
index f297f68..f36c1f9 100644
--- a/libstdc++-v3/include/std/numeric
+++ b/libstdc++-v3/include/std/numeric
@@ -712,7 +712,7 @@ namespace __detail
       return __result;
     }
 
-  // @} group numeric_ops
+  /// @} group numeric_ops
 #endif // C++17
 
 _GLIBCXX_END_NAMESPACE_VERSION
diff --git a/libstdc++-v3/include/std/ostream b/libstdc++-v3/include/std/ostream
index c7c4e78..a70221f 100644
--- a/libstdc++-v3/include/std/ostream
+++ b/libstdc++-v3/include/std/ostream
@@ -96,7 +96,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       class sentry;
       friend class sentry;
 
-      //@{
+      ///@{
       /**
        *  @brief  Interface for manipulators.
        *
@@ -132,9 +132,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	__pf(*this);
 	return *this;
       }
-      //@}
+      ///@}
 
-      //@{
+      ///@{
       /**
        *  @name Inserters
        *
@@ -153,7 +153,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
        *  be rethrown.
       */
 
-      //@{
+      ///@{
       /**
        *  @brief Integer arithmetic inserters
        *  @param  __n A variable of builtin integral type.
@@ -205,9 +205,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       operator<<(unsigned long long __n)
       { return _M_insert(__n); }
 #endif
-      //@}
+      ///@}
 
-      //@{
+      ///@{
       /**
        *  @brief  Floating point arithmetic inserters
        *  @param  __f A variable of builtin floating point type.
@@ -231,7 +231,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       __ostream_type&
       operator<<(long double __f)
       { return _M_insert(__f); }
-      //@}
+      ///@}
 
       /**
        *  @brief  Pointer arithmetic inserters
@@ -274,9 +274,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       */
       __ostream_type&
       operator<<(__streambuf_type* __sb);
-      //@}
+      ///@}
 
-      //@{
+      ///@{
       /**
        *  @name Unformatted Output Functions
        *
@@ -339,7 +339,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       */
       __ostream_type&
       write(const char_type* __s, streamsize __n);
-      //@}
+      ///@}
 
       /**
        *  @brief  Synchronizing the stream buffer.
@@ -485,7 +485,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       { return _M_ok; }
     };
 
-  //@{
+  ///@{
   /**
    *  @brief  Character inserters
    *  @param  __out  An output stream.
@@ -568,9 +568,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     operator<<(basic_ostream<wchar_t, _Traits>&, char32_t) = delete;
 #endif // _GLIBCXX_USE_WCHAR_T
 #endif // C++20
-  //@}
+  ///@}
 
-  //@{
+  ///@{
   /**
    *  @brief  String inserters
    *  @param  __out  An output stream.
@@ -664,7 +664,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     operator<<(basic_ostream<wchar_t, _Traits>&, const char32_t*) = delete;
 #endif // _GLIBCXX_USE_WCHAR_T
 #endif // C++20
-  //@}
+  ///@}
 
   // Standard basic_ostream manipulators
 
diff --git a/libstdc++-v3/include/std/ratio b/libstdc++-v3/include/std/ratio
index 4de6bf8..ceee7d0 100644
--- a/libstdc++-v3/include/std/ratio
+++ b/libstdc++-v3/include/std/ratio
@@ -567,7 +567,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   typedef ratio<         1000000000000000, 1> peta;
   typedef ratio<      1000000000000000000, 1> exa;
 
-  // @} group ratio
+  /// @} group ratio
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
diff --git a/libstdc++-v3/include/std/shared_mutex b/libstdc++-v3/include/std/shared_mutex
index 013b183..edf6dcd 100644
--- a/libstdc++-v3/include/std/shared_mutex
+++ b/libstdc++-v3/include/std/shared_mutex
@@ -851,7 +851,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     swap(shared_lock<_Mutex>& __x, shared_lock<_Mutex>& __y) noexcept
     { __x.swap(__y); }
 
-  // @} group mutexes
+  /// @} group mutexes
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
 
diff --git a/libstdc++-v3/include/std/stdexcept b/libstdc++-v3/include/std/stdexcept
index 6e6d720..5432d90 100644
--- a/libstdc++-v3/include/std/stdexcept
+++ b/libstdc++-v3/include/std/stdexcept
@@ -299,7 +299,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     virtual ~underflow_error() _GLIBCXX_NOTHROW;
   };
 
-  // @} group exceptions
+  /// @} group exceptions
 
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
diff --git a/libstdc++-v3/include/std/streambuf b/libstdc++-v3/include/std/streambuf
index ae2eaa3..e213104 100644
--- a/libstdc++-v3/include/std/streambuf
+++ b/libstdc++-v3/include/std/streambuf
@@ -122,7 +122,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     class basic_streambuf
     {
     public:
-      //@{
+      ///@{
       /**
        *  These are standard types.  They permit a standardized way of
        *  referring to names of (or names dependent on) the template
@@ -133,12 +133,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       typedef typename traits_type::int_type 		int_type;
       typedef typename traits_type::pos_type 		pos_type;
       typedef typename traits_type::off_type 		off_type;
-      //@}
+      ///@}
 
-      //@{
+      ///@{
       /// This is a non-standard type.
       typedef basic_streambuf<char_type, traits_type>  	__streambuf_type;
-      //@}
+      ///@}
 
       friend class basic_ios<char_type, traits_type>;
       friend class basic_istream<char_type, traits_type>;
@@ -232,7 +232,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       { return _M_buf_locale; }
 
       // [27.5.2.2.2] buffer management and positioning
-      //@{
+      ///@{
       /**
        *  @brief  Entry points for derived buffer functions.
        *
@@ -274,7 +274,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       */
       int
       pubsync() { return this->sync(); }
-      //@}
+      ///@}
 
       // [27.5.2.2.3] get area
       /**
@@ -472,7 +472,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       { }
 
       // [27.5.2.3.1] get area access
-      //@{
+      ///@{
       /**
        *  @brief  Access to the get area.
        *
@@ -491,7 +491,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
       char_type*
       egptr() const { return _M_in_end; }
-      //@}
+      ///@}
 
       /**
        *  @brief  Moving the read position.
@@ -519,7 +519,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       }
 
       // [27.5.2.3.2] put area access
-      //@{
+      ///@{
       /**
        *  @brief  Access to the put area.
        *
@@ -538,7 +538,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
       char_type*
       epptr() const { return _M_out_end; }
-      //@}
+      ///@}
 
       /**
        *  @brief  Moving the write position.
diff --git a/libstdc++-v3/include/std/system_error b/libstdc++-v3/include/std/system_error
index c8bb560..8c10a89 100644
--- a/libstdc++-v3/include/std/system_error
+++ b/libstdc++-v3/include/std/system_error
@@ -263,7 +263,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
     { return (__os << __e.category().name() << ':' << __e.value()); }
 
-  // @}
+  /// @}
 
   error_condition make_error_condition(errc) noexcept;
 
diff --git a/libstdc++-v3/include/std/thread b/libstdc++-v3/include/std/thread
index ad38339..66738e1 100644
--- a/libstdc++-v3/include/std/thread
+++ b/libstdc++-v3/include/std/thread
@@ -297,7 +297,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   };
 #endif // __cpp_lib_jthread
 
-  // @} group threads
+  /// @} group threads
 
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
diff --git a/libstdc++-v3/include/std/valarray b/libstdc++-v3/include/std/valarray
index c387881..ad3e14e 100644
--- a/libstdc++-v3/include/std/valarray
+++ b/libstdc++-v3/include/std/valarray
@@ -595,7 +595,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       return _M_data[__i];
     }
 
-  // @} group numeric_arrays
+  /// @} group numeric_arrays
 
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
@@ -1245,7 +1245,7 @@ _DEFINE_BINARY_OPERATOR(>=, __greater_equal)
     { return std::__addressof(__va[0]) + __va.size(); }
 #endif // C++11
 
-  // @} group numeric_arrays
+  /// @} group numeric_arrays
 
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant
index d1e5dbc..1ef9b97 100644
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -23,7 +23,7 @@
 // <http://www.gnu.org/licenses/>.
 
 /** @file variant
- *  This is the <variant> C++ Library header.
+ *  This is the `<variant>` C++ Library header.
  */
 
 #ifndef _GLIBCXX_VARIANT