Add a test for #2759

tests/target/issue-2759.rs

@@ -0,0 +1,64 @@
+// rustfmt-wrap_comments: true
+// rustfmt-max_width: 89
+
+// Code block in doc comments that will exceed max width.
+/// ```rust
+/// extern crate actix_web;
+/// use actix_web::{actix, server, App, HttpResponse};
+///
+/// fn main() {
+///     // Run actix system, this method actually starts all async processes
+///     actix::System::run(|| {
+///         server::new(|| App::new().resource("/", |r| r.h(|_| HttpResponse::Ok())))
+///             .bind("127.0.0.1:0")
+///             .expect("Can not bind to 127.0.0.1:0")
+///             .start();
+/// #           actix::Arbiter::system().do_send(actix::msgs::SystemExit(0));
+///     });
+/// }
+/// ```
+fn foo() {}
+
+// Code block in doc comments without the closing '```'.
+/// ```rust
+/// # extern crate actix_web;
+/// use actix_web::{App, HttpResponse, http};
+///
+/// fn main() {
+///     let app = App::new()
+///         .resource(
+///             "/", |r| r.method(http::Method::GET).f(|r| HttpResponse::Ok()))
+///         .finish();
+/// }
+fn bar() {}
+
+// `#` with indent.
+/// ```rust
+/// # use std::thread;
+/// # extern crate actix_web;
+/// use actix_web::{server, App, HttpResponse};
+///
+/// struct State1;
+///
+/// struct State2;
+///
+/// fn main() {
+///     # thread::spawn(|| {
+///     server::new(|| {
+///         vec![
+///             App::with_state(State1)
+///                 .prefix("/app1")
+///                 .resource("/", |r| r.f(|r| HttpResponse::Ok()))
+///                 .boxed(),
+///             App::with_state(State2)
+///                 .prefix("/app2")
+///                 .resource("/", |r| r.f(|r| HttpResponse::Ok()))
+///                 .boxed(),
+///         ]
+///     }).bind("127.0.0.1:8080")
+///         .unwrap()
+///         .run()
+///     # });
+/// }
+/// ```
+fn foobar() {}