Revert "ignore some doc tests"

This reverts commit f92d065.

tokio-macros/src/lib.rs

@@ -210,7 +210,7 @@ use proc_macro::TokenStream;
 ///
 /// This option is only compatible with the `current_thread` runtime.
 ///
-/// ```ignore
+/// ```no_run
 /// #[cfg(tokio_unstable)]
 /// #[tokio::main(flavor = "current_thread", unhandled_panic = "shutdown_runtime")]
 /// async fn main() {
@@ -224,7 +224,7 @@ use proc_macro::TokenStream;
 ///
 /// Equivalent code not using `#[tokio::main]`
 ///
-/// ```ignore
+/// ```no_run
 /// #[cfg(tokio_unstable)]
 /// fn main() {
 ///     tokio::runtime::Builder::new_current_thread()
@@ -491,7 +491,7 @@ pub fn main_rt(args: TokenStream, item: TokenStream) -> TokenStream {
 ///
 /// Equivalent code not using `#[tokio::test]`
 ///
-/// ```ignore
+/// ```no_run
 /// #[cfg(tokio_unstable)]
 /// #[test]
 /// fn my_test() {