Fix typo in comment

src/function.rs

@@ -209,7 +209,7 @@ where
             // In case there is a reference to the old memo out there, we have to store it
             // in the deleted entries. This will get cleared when a new revision starts.
             //
-            // SAFETY: Once the revision starts, there will be no oustanding borrows to the
+            // SAFETY: Once the revision starts, there will be no outstanding borrows to the
             // memo contents, and so it will be safe to free.
             unsafe { self.deleted_entries.push(old_value) };
         }

src/function/maybe_changed_after.rs

@@ -290,7 +290,7 @@ where
 
         match &old_memo.revisions.origin {
             QueryOrigin::Assigned(_) => {
-                // If the value was assigneed by another query,
+                // If the value was assigned by another query,
                 // and that query were up-to-date,
                 // then we would have updated the `verified_at` field already.
                 // So the fact that we are here means that it was not specified

src/function/specify.rs

@@ -126,7 +126,7 @@ where
         };
 
         // If we are marking this as validated, it must be a value that was
-        // assigneed by `executor`.
+        // assigned by `executor`.
         match memo.revisions.origin {
             QueryOrigin::Assigned(by_query) => assert_eq!(by_query, executor),
             _ => panic!(