typos

Author: RalfJung

src/liballoc/rc.rs

@@ -1158,8 +1158,8 @@ pub struct Weak<T: ?Sized> {
     // This is a `NonNull` to allow optimizing the size of this type in enums,
     // but it is not necessarily a valid pointer.
     // `Weak::new` sets this to `usize::MAX` so that it doesn’t need
-    // to allocate space on the heap.  That's not a value a real poiner
-    // will ever have because RcBox has alignment at least 4.
+    // to allocate space on the heap.  That's not a value a real pointer
+    // will ever have because RcBox has alignment at least 2.
     ptr: NonNull<RcBox<T>>,
 }
 

src/liballoc/sync.rs

@@ -239,8 +239,8 @@ pub struct Weak<T: ?Sized> {
     // This is a `NonNull` to allow optimizing the size of this type in enums,
     // but it is not necessarily a valid pointer.
     // `Weak::new` sets this to `usize::MAX` so that it doesn’t need
-    // to allocate space on the heap.  That's not a value a real poiner
-    // will ever have because RcBox has alignment at least 4.
+    // to allocate space on the heap.  That's not a value a real pointer
+    // will ever have because RcBox has alignment at least 2.
     ptr: NonNull<ArcInner<T>>,
 }