Shuffle identical values in filtered deck sort (#3259)

* Shuffle identical values in filtered deck sort

* Update test

pylib/tests/test_schedv3.py

@@ -724,7 +724,6 @@ def test_preview():
     note["Front"] = "one"
     col.addNote(note)
     c = note.cards()[0]
-    orig = copy.copy(c)
     note2 = col.newNote()
     note2["Front"] = "two"
     col.addNote(note2)
@@ -757,10 +756,6 @@ def test_preview():
     assert c2.reps == 0
     assert c2.type == CARD_TYPE_NEW
 
-    # the other card should appear again
-    c = col.sched.getCard()
-    assert c.id == orig.id
-
     # emptying the filtered deck should restore card
     col.sched.empty_filtered_deck(did)
     c.load()

rslib/src/storage/card/filtered.rs

@@ -46,5 +46,5 @@ then (ivl / cast({today}-due+0.001 as real)) else 100000+due end)",
         }
     };
 
-    format!("{} limit {}", order, term.limit)
+    format!("{}, fnvhash(c.id, c.mod) limit {}", order, term.limit)
 }