message: use ptr::eq/hash for readability
diff: @@ -2,6 +2,7 @@ use crate::runtime::Revision;
  use crate::Database;
  use std::fmt::Debug;
  use std::hash::Hasher;
  +use std::ptr;
  use std::sync::Arc;
  /// Unsafe proof obligations:
  @@ -31,10 +32,6 @@ impl<DB: Database> Dependency<DB> {
  }
  }
  - fn raw_slot(&self) -> *const dyn DatabaseSlot<DB> {
  - &*self.slot
  - }
  -
  pub(crate) fn maybe_changed_since(&self, db: &DB, revision: Revision) -> bool {
  self.slot.maybe_changed_since(db, revision)
  }
  @@ -45,13 +42,13 @@ impl<DB: Database> std::hash::Hash for Dependency<DB> {
  where
  H: Hasher,
  {
  - self.raw_slot().hash(state)
  + ptr::hash(&*self.slot, state)
  }
  }
  impl<DB: Database> std::cmp::PartialEq for Dependency<DB> {
  fn eq(&self, other: &Self) -> bool {
  - self.raw_slot() == other.raw_slot()
  + ptr::eq(&*self.slot, &*other.slot)
  }
  }
  