allow looking up cards with their collector number

mtgcardlookup.py

@@ -183,11 +183,8 @@ async def get_cards(card_names):
 	for name in card_names:
 		name = re.sub(r'<.*?>', '', name).strip()
 
-		# Handle set codes
-		if '|' in name:
-			name, set_code, *_ = name.split('|')
-		else:
-			set_code = ''
+		# Handle set codes and collector numbers
+		name, set_code, collector_num, *_ = (name.split('|') + ['']*2)
 
 		try:
 			# Check if any of the easter eggs should happen
@@ -198,10 +195,26 @@ async def get_cards(card_names):
 			else:
 				c = scrython.cards.Named(fuzzy=name, set=set_code)
 
+				if collector_num:
+					c_by_num = scrython.cards.Collector(
+						code=set_code,
+						collector_number=collector_num,
+					)
+					# Make sure the provided name matches
+					if c_by_num.name() != c.name():
+						raise scrython.foundation.ScryfallError
+					
+					c = c_by_num
+			
 			cards.append(c)
 			responses.append(f'{c.name()} - {c.scryfall_uri()}')
-		except scrython.foundation.ScryfallError:
-			if set_code:
+		except scrython.foundation.ScryfallError as e:
+			if collector_num:
+				responses.append(
+					f'No card named "{name}" from set with code '
+					f'{set_code.upper()} and collector number {collector_num} '
+					'was found.')
+			elif set_code:
 				responses.append(f'No card named "{name}" from set with code {set_code.upper()} was found.')
 			else:
 				responses.append(f'No card named "{name}" was found.')