fix signed message exceeding limit

main.py

@@ -124,10 +124,12 @@ def _sign_text(text, m: Message, limit):
     if not text:
         text = ''
 
+    sign = ''
     if text.startswith('!sign') or text.startswith('/sign'):
-        text = text[5:] + f'\n\n____________\n' \
+        sign = f'\n\n____________\n' \
                f'by <a href="tg://user?id={m.from_user.id}">{escape(m.from_user.full_name)}</a>'
-    return text[:limit]
+
+    return text[:limit - len(sign)] + sign
 
 
 def _process_message(bot: Bot, m: Message):