Reduce vertical space slightly in UART examples

src/bare-metal/aps/examples/src/main_improved.rs

@@ -41,9 +41,7 @@ extern "C" fn main(x0: u64, x1: u64, x2: u64, x3: u64) {
         if let Some(byte) = uart.read_byte() {
             uart.write_byte(byte);
             match byte {
-                b'\r' => {
-                    uart.write_byte(b'\n');
-                }
+                b'\r' => uart.write_byte(b'\n'),
                 b'q' => break,
                 _ => {}
             }

src/bare-metal/aps/examples/src/pl011.rs

@@ -122,10 +122,7 @@ impl Uart {
 
         // SAFETY: We know that self.registers points to the control registers
         // of a PL011 device which is appropriately mapped.
-        unsafe {
-            // Write to the TX buffer.
-            addr_of_mut!((*self.registers).dr).write_volatile(byte.into());
-        }
+        unsafe { addr_of_mut!((*self.registers).dr).write_volatile(byte.into()) };
 
         // Wait until the UART is no longer busy.
         while self.read_flag_register().contains(Flags::BUSY) {}

src/bare-metal/aps/examples/src/pl011_minimal.rs

@@ -43,10 +43,7 @@ impl Uart {
 
         // SAFETY: We know that the base address points to the control
         // registers of a PL011 device which is appropriately mapped.
-        unsafe {
-            // Write to the TX buffer.
-            self.base_address.write_volatile(byte);
-        }
+        unsafe { self.base_address.write_volatile(byte) };
 
         // Wait until the UART is no longer busy.
         while self.read_flag_register() & FR_BUSY != 0 {}