Updated Release Notes

Author: H-G-Hristov

libcxx/docs/FeatureTestMacroTable.rst

@@ -378,7 +378,7 @@ Status
     ---------------------------------------------------------- -----------------
     ``__cpp_lib_reference_from_temporary``                     *unimplemented*
     ---------------------------------------------------------- -----------------
-    ``__cpp_lib_spanstream``                                   *unimplemented*
+    ``__cpp_lib_spanstream``                                   ``202106L``
     ---------------------------------------------------------- -----------------
     ``__cpp_lib_stacktrace``                                   *unimplemented*
     ---------------------------------------------------------- -----------------

libcxx/docs/ReleaseNotes/19.rst

@@ -65,7 +65,6 @@ Implemented Papers
 - P2591R5 - Concatenation of strings and string views
 - P2968R2 - Make ``std::ignore`` a first-class object
 - P2997R1 - Removing the common reference requirement from the indirectly invocable concepts (as DR against C++20)
-- P0448R4 - A ``strstream`` replacement using ``span<charT>`` as buffer
 - P2302R4 - ``std::ranges::contains``
 - P1659R3 - ``std::ranges::starts_with`` and ``std::ranges::ends_with``
 - P3029R1 - Better ``mdspan``'s CTAD

libcxx/docs/ReleaseNotes/20.rst

@@ -38,7 +38,7 @@ What's New in Libc++ 20.0.0?
 Implemented Papers
 ------------------
 
-- TODO
+- P0448R4 - A ``strstream`` replacement using ``span<charT>`` as buffer
 
 
 Improvements and New Features

libcxx/docs/Status/Cxx23Papers.csv

@@ -12,7 +12,7 @@
 "`P2259R1 <https://wg21.link/P2259R1>`__","LWG","Repairing input range adaptors and counted_iterator","February 2021","","","|ranges|"
 "","","","","","",""
 "`P0401R6 <https://wg21.link/P0401R6>`__","LWG","Providing size feedback in the Allocator interface","June 2021","|Complete|","15.0"
-"`P0448R4 <https://wg21.link/P0448R4>`__","LWG","A ``strstream`` replacement using ``span<charT>`` as buffer","June 2021","|Partial|","19.0"
+"`P0448R4 <https://wg21.link/P0448R4>`__","LWG","A ``strstream`` replacement using ``span<charT>`` as buffer","June 2021","|Partial|","20.0"
 "`P1132R8 <https://wg21.link/P1132R8>`__","LWG","out_ptr - a scalable output pointer abstraction","June 2021","|Complete|","19.0"
 "`P1328R1 <https://wg21.link/P1328R1>`__","LWG","Making std::type_info::operator== constexpr","June 2021","|Complete|","17.0"
 "`P1425R4 <https://wg21.link/P1425R4>`__","LWG","Iterators pair constructors for stack and queue","June 2021","|Complete|","14.0","|ranges|"