{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"assert_parse_result(\"#![cfg(foo,)]\","}]}
    assert_parse_result("#![cfg(foo,)]", CfgAtom::Flag(Symbol::intern("foo")).into());
    assert_parse_result("#![cfg(foo)]", CfgAtom::Flag(Symbol::intern("foo")).into());
    assert_parse_result(