Update hacking to 0.9.x

Address some issues that came up because of hacking upgrade.
But ignoring H904 since the slashes are valid, as they are in
comments, not code.

Change-Id: Ie8a94fc71632e4130c2ec663a5c6d3f2042f8263
Closes-Bug: #1328469
Merge "Update hacking to 0.9.x"