update documentation

unittest/src/fake/leds/mod.rs

@@ -1,9 +1,8 @@
-//! Fake implementation of the LowLevelDebug API, documented here:
-//! https://github.com/tock/tock/blob/master/doc/syscalls/00008_low_level_debug.md
+//! Fake implementation of the LEDs API, documented here:
+//! https://github.com/tock/tock/blob/master/doc/syscalls/00002_leds.md
 //!
-//! Like the real API, `LowLevelDebug` prints each message it is commanded to
-//! print. It also keeps a log of the messages as `Message` instances, which can
-//! be retrieved via `take_messages` for use in unit tests.
+//! Like the real API, `Leds` controls a set of fake LEDs. It provides
+//! a function `get_led` used to retrieve the state of an LED.
 
 use core::cell::Cell;
 use libtock_platform::{CommandReturn, ErrorCode};

unittest/src/fake/leds/tests.rs

@@ -21,7 +21,7 @@ fn command() {
     assert_eq!(leds.get_led(0), Some(false));
 }
 
-// Integration test that verifies LowLevelDebug works with fake::Kernel and
+// Integration test that verifies Leds works with fake::Kernel and
 // libtock_platform::Syscalls.
 #[test]
 fn kernel_integration() {