fixed broken postfix test

tests/test_pack.py

@@ -100,15 +100,15 @@ def test_builtins_and_exceptions_integrity(pack_data):
 
 def test_postfix_keywords_integrity(pack_data):
     path, data = pack_data
-    assert (
-        "postfix_keywords" in data
-    ), f"Missing 'postfix_keywords' section in {path.name}"
-    assert isinstance(
-        data["postfix_keywords"], list
-    ), "'postfix_keywords' must be an array/list"
+    assert "postfix_keywords" in data, f"Missing 'postfix_keywords' section in {path.name}"
+    assert isinstance(data["postfix_keywords"], list), "'postfix_keywords' must be an array/list"
     
-    # Ensure any declared postfix keyword is actually registered in the main keywords dictionary
+    # Extract all the English Python keywords that have been mapped in this pack
+    mapped_python_targets = set(data["keywords"].values())
+    
+    # Ensure any declared English postfix keyword actually has a mapped translation
     for post_kw in data["postfix_keywords"]:
-        assert (
-            post_kw in data["keywords"]
-        ), f"Postfix keyword '{post_kw}' is missing from the main 'keywords' mapping in {path.name}."
+        assert post_kw in mapped_python_targets, (
+            f"English postfix keyword '{post_kw}' is missing from the mapped values "
+            f"in the main 'keywords' dictionary in {path.name}."
+        )