Update Lib/ntpath.py

Co-authored-by: Eryk Sun <[email protected]>

Author: nineteendo

Lib/ntpath.py

@@ -581,7 +581,7 @@ def abspath(path):
         path = os.fspath(path)
         if not isabs(path):
             if isinstance(path, bytes):
-                sep = b'/'
+                sep = b'\\'
                 cwd = os.getcwdb()
             else:
                 sep = '/'