mitchellh/vagrant — pull request #4059 by brettporter (2014-06-18 06:10:42+00:00)
Title: Unable to use puppet.working_directory on Windows

Fix escaping of powershell variable.

As this is nested in a powershell variable `$command`, it must be escaped
otherwise it is evaluated when the variable is created, giving an error that
`The term 'True' is not recognized as the name of a cmdlet, function,
script`. This prevented using a `puppet.working_directory` on Windows.