Code review comment for lp:~jameinel/bzr/2.1.0b4-win32-unsupported_encoding_commit_message

It is possible to give bazaar commit messages in the wrong encoding under windows using subprocess, but as what happens depends on the codepage, it's not very interesting to test. Again, would prefer if this didn't check sys.platform but confirmed that it does turn the failure into a n/a here.