Added notice that links are returned in ascending order

JosXa · JosXa · commit 54690a1e9aad · 2018-02-01T17:16:58.000+01:00
diff --git a/telegram/utils/helpers.py b/telegram/utils/helpers.py
@@ -138,7 +138,8 @@ def _extract_urls_from_text(text):
 def extract_urls(message):
     """
     Extracts all Hyperlinks that are contained in a message. This includes
-    message entities and the media caption.
+    message entities and the media caption. The links are returned in lexicographically
+    ascending order.
 
     Note: Exact duplicates are removed, but there may still be URLs that link
     to the same resource.
