explain that PhantomData<&'a T> infers T: 'a

Author: Lukas Markeffsky

library/core/src/marker.rs

@@ -532,14 +532,14 @@ impl<T: ?Sized> !Sync for *mut T {}
 /// use std::marker::PhantomData;
 ///
 /// # #[allow(dead_code)]
-/// struct Slice<'a, T: 'a> {
+/// struct Slice<'a, T> {
 ///     start: *const T,
 ///     end: *const T,
 ///     phantom: PhantomData<&'a T>,
 /// }
 /// ```
 ///
-/// This also in turn requires the annotation `T: 'a`, indicating
+/// This also in turn infers the lifetime bound `T: 'a`, indicating
 /// that any references in `T` are valid over the lifetime `'a`.
 ///
 /// When initializing a `Slice` you simply provide the value
@@ -548,7 +548,7 @@ impl<T: ?Sized> !Sync for *mut T {}
 /// ```
 /// # #![allow(dead_code)]
 /// # use std::marker::PhantomData;
-/// # struct Slice<'a, T: 'a> {
+/// # struct Slice<'a, T> {
 /// #     start: *const T,
 /// #     end: *const T,
 /// #     phantom: PhantomData<&'a T>,