No investigation into Mali mission leak – a double standard for the Mark Norman case?

Last Friday a government source or sources outlined details of a Cabinet decision to send Canadian military helicopters and personnel to Mali. The leak came three days before Defence Minister Harjit Sajjan and Foreign Affairs Minister Chrystia Freeland made the official announcement.
Naturally you would expect the Liberal government to launch an investigation into who leaked such sensitive – and arguably secret – military information to journalists.
That is, of course, what happened