parse namespace error

there will be error when namespace contains character "-"
eg:
# kubectl debug xxx -n sh3-abc
# cannot create resource "pods" in API group "" in the namespace "default"

Reproduce the kubectl debug command with a namespace containing a hyphen, such as `sh3-abc`, and compare it with a namespace without one. Trace how the namespace argument reaches resource creation; done means the command targets the supplied namespace rather than default. The repository notes that it is no longer maintained and points to another project.

Written by the indexing model from the issue text.