is_mount: windows needs add'l check for some Python

Author: scivision

+stdlib/+python/is_mount.m

@@ -4,6 +4,13 @@
 
 function y = is_mount(filepath)
 
+% this is necessary for some Pythons, even the same X.Y may have different behavior due to
+% patch bugfixes
+if ~isfolder(filepath) || (filepath == stdlib.root(filepath) && ~endsWith(filepath, ["/", "\"]))
+  y = false;
+  return
+end
+
 try
   y = py.os.path.ismount(filepath);
 catch e