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PR go/83102 * include/bits/stl_tree.h (_Rb_tree): Relax invocable checks for comparison object pre-C++17. From-SVN: r255052
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.