escape patterns want to be raw strings

src/tools/aoc.py

@@ -163,7 +163,7 @@ class AOCDay:
         message = soup.article.text
         if "That's the right answer" in message:
             answer_cache[str_day][str_part]["correct"] = answer
-            has_rank = re.findall("You achieved.*rank (\d+)", message)
+            has_rank = re.findall(r"You achieved.*rank (\d+)", message)
             print("That's correct!%s" % f" (Rank {has_rank[0]})" if has_rank else "")
             webbrowser.open(
                 "https://adventofcode.com/%d/day/%d#part2" % (self.year, self.day)