add a doc line for the module

Joeyh021 · Joeyh021 · commit d1272fadfa06 · 2022-07-30T23:44:32.000+01:00
diff --git a/src/delay.rs b/src/delay.rs
@@ -1,3 +1,4 @@
+//! Delay devices and providers
 use crate::register::mcycle;
 use embedded_hal::blocking::delay::{DelayMs, DelayUs};
 

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,4 @@`
	`1`	`+//! Delay devices and providers`
`1`	`2`	`use crate::register::mcycle;`
`2`	`3`	`use embedded_hal::blocking::delay::{DelayMs, DelayUs};`
`3`	`4`