Update pywwwget_merged.py

Author: ReikaNekoUwU

PyWWW/pywwwget_merged.py

@@ -552,7 +552,7 @@ def detect_cwd(ftp, file_dir):
     Test whether cwd into file_dir works. Returns True if it does,
     False if not (so absolute paths should be used).
     """
-    if not file_dir or file_dir in ("/", ""):
+    if not file_dir:
         return False  # nothing to cwd into
     try:
         ftp.cwd(file_dir)