Update comments and fmt

Author: usbalbin

examples/comp.rs

@@ -1,3 +1,8 @@
+//! ## Origin
+//!
+//! This code has been taken from the stm32g0xx-hal project and modified slightly to support
+//! STM32G4xx MCUs.
+
 //#![deny(warnings)]
 #![deny(unsafe_code)]
 #![no_main]

examples/dac.rs

@@ -1,3 +1,8 @@
+//! ## Origin
+//!
+//! This code has been taken from the stm32g0xx-hal project and modified to support
+//! STM32G4xx MCUs.
+
 // #![deny(warnings)]
 #![deny(unsafe_code)]
 #![no_main]

src/comparator.rs

@@ -347,7 +347,7 @@ refint_input!(COMP5, COMP6, COMP7,);
 
 macro_rules! dac_input_helper {
     ($COMP:ident: $channel:ident, $MODE:ident, $bits:expr) => {
-        impl<ED> NegativeInput<$COMP> for &dac::$channel<{dac::$MODE}, ED> {
+        impl<ED> NegativeInput<$COMP> for &dac::$channel<{ dac::$MODE }, ED> {
             const USE_VREFINT: bool = false;
 
             fn use_resistor_divider(&self) -> bool {

src/dac.rs

@@ -2,7 +2,7 @@
 //!
 //! ## Origin
 //!
-//! This code has been taken from the stm32g0xx-hal project and modified slightly to support
+//! This code has been taken from the stm32g0xx-hal project and modified to support
 //! STM32G4xx MCUs.
 
 use core::marker::PhantomData;