The status of P1353R0 was "Partial" because we don't define the
__cpp_lib_three_way_comparison macro, but that's because we don't
support the feature. So the paper can be marked as done.
* doc/xml/manual/status_cxx2020.xml: Add feature-test macro for
P0811R3. Change status of P135
* doc/xml/manual/status_cxx2020.xml: Update C++20 status.
* doc/html/*: Regenerate.
Committed to trunk.
commit bdac401ac5bb8046cfb19951820af229991151f2
Author: Jonathan Wakely
Date: Thu Mar 7 14:19:43 2019 +
Update C++20 status table in libstdc++ manual
