Update regex to fetch URLs to match the official client.

Fixes #2420.

discord/utils.py

@@ -438,7 +438,7 @@ def escape_markdown(text, *, as_needed=False, ignore_links=True):
     """
 
     if not as_needed:
-        url_regex = r'(?P<url>(?:https?|steam)://(?:-\.)?(?:[^\s/?\.#-]+\.?)+(?:/[^\s]*)?)'
+        url_regex = r'(?P<url><[^: >]+:\/[^ >]+>|(?:https?|steam):\/\/[^\s<]+[^<.,:;\"\'\]\s])'
         def replacement(match):
             groupdict = match.groupdict()
             is_url = groupdict.get('url')