Add tests to our CI

Also found some doctests that were failing

embassy/src/executor/timer.rs

@@ -67,7 +67,6 @@ impl Timer {
     /// # #![feature(type_alias_impl_trait)]
     /// #
     /// # fn foo() {}
-    /// use embassy::executor::task;
     /// use embassy::time::{Duration, Timer};
     ///
     /// #[embassy::task]
@@ -110,7 +109,6 @@ impl Future for Timer {
 /// # #![feature(impl_trait_in_bindings)]
 /// # #![feature(type_alias_impl_trait)]
 /// #
-/// use embassy::executor::task;
 /// use embassy::time::{Duration, Timer};
 /// # fn foo() {}
 ///
@@ -134,7 +132,6 @@ impl Future for Timer {
 /// # #![feature(impl_trait_in_bindings)]
 /// # #![feature(type_alias_impl_trait)]
 /// #
-/// use embassy::executor::task;
 /// use embassy::time::{Duration, Ticker};
 /// use futures::StreamExt;
 /// # fn foo(){}

embassy/src/io/util/copy_buf.rs

@@ -17,7 +17,7 @@ use crate::io::{AsyncBufRead, AsyncWrite, Error, Result};
 ///
 /// # Examples
 ///
-/// ```
+/// ``` ignore
 /// # futures::executor::block_on(async {
 /// use futures::io::{self, AsyncWriteExt, Cursor};
 ///

embassy/src/util/signal.rs

@@ -119,7 +119,6 @@ unsafe impl cortex_m::interrupt::Nr for NrWrap {
 /// ``` no_compile
 /// use embassy::traits::*;
 /// use embassy::util::InterruptFuture;
-/// use embassy::executor::task;
 /// use embassy_stm32::interrupt; // Adjust this to your MCU's embassy HAL.
 /// #[embassy::task]
 /// async fn demo_interrupt_future() {