Hi

     Here is a patch to fix std::span pretty printer in versioned 
namespace mode.

     Note that there is still a problem with std::atomic after this patch.

got: $13 = std::atomic<std::__8::shared_ptr<int>> (empty) = {get() = 0x0}
FAIL: libstdc++-prettyprinters/cxx20.cc print spe

     libstdc++: [_GLIBCXX_INLINE_VERSION] Fix std::span pretty printer

     libstdc++-v3/ChangeLog:

             * python/libstdcxx/v6/printers.py (StdSpanPrinter.__init__):
             Strip typename from version namespace.

Tested under Linux x86_64 _GLIBCXX_INLINE_VERSION mode.

Ok to commit ?

François