libstdc++: Fix regression in libstdc++-prettyprinters/cxx20.cc

	* python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update
	value for partial_ordering::unordered.

libstdc++-v3/ChangeLog

 2020-02-17  Jonathan Wakely  <jwakely@redhat.com>
 
+	* python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update
+	value for partial_ordering::unordered.
+
 	* include/bits/iterator_concepts.h (indirectly_copyable_storable): Add
 	const-qualified expression variations.
 	* include/std/concepts (copyable): Likewise.

libstdc++-v3/python/libstdcxx/v6/printers.py

@@ -1435,7 +1435,7 @@ class StdCmpCatPrinter:
         if self.typename == 'strong_ordering' and self.val == 0:
             name = 'equal'
         else:
-            names = {-127:'unordered', -1:'less', 0:'equivalent', 1:'greater'}
+            names = {2:'unordered', -1:'less', 0:'equivalent', 1:'greater'}
             name = names[int(self.val)]
         return 'std::{}::{}'.format(self.typename, name)