Do not unescape backslashes in Windows

IPython/utils/path.py

@@ -373,8 +373,11 b' def shellglob(args):'
 
     """
     expanded = []
+    # Do not unescape backslash in Windows as it is interpreted as
+    # path separator:
+    unescape = unescape_glob if sys.platform != 'win32' else lambda x: x
     for a in args:
-        expanded.extend(glob.glob(a) or [unescape_glob(a)])
+        expanded.extend(glob.glob(a) or [unescape(a)])
     return expanded