[Units] Remove asterisks when checking trivia answers

[Tests] Add test for trivia answer with asterisks

tests/test_trivia.py

@@ -50,6 +50,11 @@ def test_and_with_and_in_item(self):
     def test_ampersand(self):
         self.assertTrue(check_answer(answer = "AT&T", response = "at&t"))
 
+    def test_asterisks(self):
+        self.assertTrue(
+            check_answer(answer = "*a pine (**a fir)", response = "pine")
+        )
+
     def test_clue_text_plural_subject_redundancy_in_answer(self):
         for clue, answer, response in (
             (

units/trivia.py

@@ -47,8 +47,9 @@ def check_answer(*, answer, response, clue = None, inflect_engine = None):
     # Replace: & -> and
     answer = answer.replace('&', "and")
     response = response.replace('&', "and")
-    # Remove exclamation marks, periods, quotation marks, and interpuncts
-    for character in '!."·':
+    # Remove exclamation marks, quotation marks, asterisks, periods, and
+    # interpuncts
+    for character in '!"*.·':
         if character in answer:
             answer = answer.replace(character, "")
         if character in response: