{"ast_node_type":"other","tokens":[{"end":124,"kind":"keyword","start":0,"text":"//"}]}
    // FIXME: move this function to outer scope (https://github.com/rust-lang/rust-analyzer/pull/2834#discussion_r366196658)
fn validate_literal(literal: ast::Literal, acc: &mut Vec<SyntaxError>) {
    fn unquote(text: &str, prefix_len: usize, end_delimiter: char) -> Option<&str> {