[libc++] mark P0645 as complete

Author: h-vetinari

libcxx/docs/Status/Cxx20.rst

@@ -41,8 +41,8 @@ Paper Status
 .. note::
 
    .. [#note-P0591] P0591: The changes in [mem.poly.allocator.mem] are missing.
-   .. [#note-P0645] P0645: The paper is implemented but still marked as an incomplete feature
-      (the feature-test macro is not set).
+   .. [#note-P0645] P0645: The implementation was largely complete since Clang 14,
+      but the feature-test macro was not set.
    .. [#note-P0966] P0966: It was previously erroneously marked as complete in version 8.0. See `bug 45368 <https://llvm.org/PR45368>`__.
    .. [#note-P0619] P0619: Only sections D.8, D.9, D.10 and D.13 are implemented. Sections D.4, D.7, D.11, and D.12 remain undone.
    .. [#note-P0883.1] P0883: shared_ptr and floating-point changes weren't applied as they themselves aren't implemented yet.

libcxx/docs/Status/Cxx20Papers.csv

@@ -103,7 +103,7 @@
 "`P0466R5 <https://wg21.link/P0466R5>`__","Layout-compatibility and Pointer-interconvertibility Traits","Cologne","","",""
 "`P0553R4 <https://wg21.link/P0553R4>`__","Bit operations","Cologne","|Complete|","9.0",""
 "`P0631R8 <https://wg21.link/P0631R8>`__","Math Constants","Cologne","|Complete|","11.0",""
-"`P0645R10 <https://wg21.link/P0645R10>`__","Text Formatting","Cologne","|Complete| [#note-P0645]_","14.0",""
+"`P0645R10 <https://wg21.link/P0645R10>`__","Text Formatting","Cologne","|Complete| [#note-P0645]_","19.0",""
 "`P0660R10 <https://wg21.link/P0660R10>`__","Stop Token and Joining Thread, Rev 10.","Cologne","|Complete| [#note-P0660]_","18.0",""
 "`P0784R7 <https://wg21.link/P0784R7>`__","More constexpr containers","Cologne","|Complete|","12.0",""
 "`P0980R1 <https://wg21.link/P0980R1>`__","Making std::string constexpr","Cologne","|Complete|","15.0",""