Small improvement in truncate_titles

Strip truncated text before adding ellipsis.

main.py

@@ -20,7 +20,7 @@ def _truncate_title(title: str, length: int = 30) -> str:
         return title[:length]
     if len(title) <= length:
         return title
-    return title[:length-3] + (title[length:] and '...')
+    return title[:length-3].strip() + (title[length:] and '...')
 
 
 def get_yt_creds():