Add term:sym<circumfix> as found in STD, which we were missing in the…

… Rakudo grammar.

src/Perl6/Actions.pm

@@ -659,6 +659,7 @@ method term:sym<routine_declarator>($/) { make $<routine_declarator>.ast; }
 method term:sym<multi_declarator>($/)   { make $<multi_declarator>.ast; }
 method term:sym<regex_declarator>($/)   { make $<regex_declarator>.ast; }
 method term:sym<type_declarator>($/)    { make $<type_declarator>.ast; }
+method term:sym<circumfix>($/)          { make $<circumfix>.ast; }
 method term:sym<statement_prefix>($/)   { make $<statement_prefix>.ast; }
 method term:sym<lambda>($/)             { make block_closure($<pblock>.ast, 'Block', 0); }
 method term:sym<sigterm>($/)            { make $<sigterm>.ast; }

src/Perl6/Grammar.pm

@@ -514,6 +514,7 @@ token term:sym<scope_declarator>   { <scope_declarator> }
 token term:sym<routine_declarator> { <routine_declarator> }
 token term:sym<multi_declarator>   { <?before 'multi'|'proto'|'only'> <multi_declarator> }
 token term:sym<regex_declarator>   { <regex_declarator> }
+token term:sym<circumfix>          { <circumfix> }
 token term:sym<statement_prefix>   { <statement_prefix> }
 token term:sym<*>                  { <sym> }
 token term:sym<lambda>             { <?lambda> <pblock> }