Typo fix (spelling mistake in error message).

Lib/macpath.py

@@ -188,7 +188,7 @@ def normpath(s):
                 i = i - 1
             else:
                 # best way to handle this is to raise an exception
-                raise norm_error, 'Cannot use :: immedeately after volume name'
+                raise norm_error, 'Cannot use :: immediately after volume name'
         else:
             i = i + 1