#![feature(array_windows)]
#![feature(box_patterns)]
#![feature(if_let_guard)]
+#![feature(iter_intersperse)]
#![feature(let_chains)]
#![feature(never_type)]
#![feature(rustc_attrs)]
// uses a HOF to parse anything, and <source> includes file and
// `source_str`.
-/// A variant of 'panictry!' that works on a Vec<Diagnostic> instead of a single DiagnosticBuilder.
+/// A variant of 'panictry!' that works on a `Vec<Diagnostic>` instead of a single
+/// `DiagnosticBuilder`.
macro_rules! panictry_buffer {
($handler:expr, $e:expr) => {{
use rustc_errors::FatalError;