kernel: doc: fixes and improvements

kernel/src/debug.rs

@@ -418,7 +418,8 @@ pub struct DebugWriter {
 
 /// Static variable that holds the kernel's reference to the debug tool.
 ///
-/// This is needed so the debug!() macros have a reference to the object to use.
+/// This is needed so the `debug!()` macros have a reference to the object to
+/// use.
 static mut DEBUG_WRITER: Option<&'static mut DebugWriterWrapper> = None;
 
 unsafe fn try_get_debug_writer() -> Option<&'static mut DebugWriterWrapper> {

kernel/src/utilities/copy_slice.rs

@@ -22,7 +22,7 @@ use core::ptr;
 pub trait CopyOrErr {
     /// Copy a non-overlapping slice from `src` to `self`.
     ///
-    /// This is a non-panicing version of [`slice::copy_from_slice`].
+    /// This is a non-panicking version of [`slice::copy_from_slice`].
     ///
     /// Returns `Err(ErrorCode)` if `src` and `self` are not the same length.
     fn copy_from_slice_or_err(&mut self, src: &Self) -> Result<(), ErrorCode>;