Fix clippy warnings

Author: teskje

examples/spi.rs

@@ -49,9 +49,9 @@ fn main() -> ! {
 
     // Create an `u8` array, which can be transfered via SPI.
     let msg_send: [u8; 8] = [0xD, 0xE, 0xA, 0xD, 0xB, 0xE, 0xE, 0xF];
-    // Clone the array, as it would be mutually shared in `transfer` while simultaniously would be
+    // Copy the array, as it would be mutually shared in `transfer` while simultaneously would be
     // immutable shared in `assert_eq`.
-    let mut msg_sending = msg_send.clone();
+    let mut msg_sending = msg_send;
     // Transfer the content of the array via SPI and receive it's output.
     // When MOSI and MISO pins are connected together, `msg_received` should receive the content.
     // from `msg_sending`

src/i2c.rs

@@ -27,6 +27,7 @@ use crate::time::Hertz;
 
 /// I2C error
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum Error {
     /// Bus error
     Bus,
@@ -36,8 +37,6 @@ pub enum Error {
     // Pec, // SMBUS mode only
     // Timeout, // SMBUS mode only
     // Alert, // SMBUS mode only
-    #[doc(hidden)]
-    _Extensible,
 }
 
 // FIXME these should be "closed" traits

src/serial.rs

@@ -52,6 +52,7 @@ pub enum Event {
 
 /// Serial error
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum Error {
     /// Framing error
     Framing,
@@ -61,8 +62,6 @@ pub enum Error {
     Overrun,
     /// Parity check error
     Parity,
-    #[doc(hidden)]
-    _Extensible,
 }
 
 // FIXME these should be "closed" traits

src/spi.rs

@@ -49,15 +49,14 @@ use crate::time::Hertz;
 
 /// SPI error
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum Error {
     /// Overrun occurred
     Overrun,
     /// Mode fault occurred
     ModeFault,
     /// CRC error
     Crc,
-    #[doc(hidden)]
-    _Extensible,
 }
 
 // FIXME these should be "closed" traits