Method fmt

crates/codegen/src/unparse.rs:668–670

(&self, f: &mut fmt::Formatter<'_>)

impl fmt::Display for UnparseExpr<'_> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        Unparser::new(f, self.source).unparse_expr(self.expr, precedence::TEST)
    }
}