c++: Use -std=c++20 in testsuite default std list

C++20 has been official for a while now.

gcc/testsuite/ChangeLog:

	* lib/g++-dg.exp: Change 2a to 20.

diff --git a/gcc/testsuite/lib/g++-dg.exp b/gcc/testsuite/lib/g++-dg.exp
index ea7ec9e..a1bc370 100644 (file)
--- a/gcc/testsuite/lib/g++-dg.exp
+++ b/gcc/testsuite/lib/g++-dg.exp
@@ -52,7 +52,7 @@ proc g++-dg-runtest { testcases flags default-extra-flags } {
            if { [llength $gpp_std_list] > 0 } {
                set std_list $gpp_std_list
            } else {
-               set std_list { 98 14 17 2a }
+               set std_list { 98 14 17 20 }
            }
            set option_list { }
            foreach x $std_list {