There should be an warning message when checking out non-existing subdir

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Check out a non-existing subdir from a session, like "boar co 
MySession/this_dir_does_not_exist"

What is the expected output? What do you see instead?
The operation completes without an error and an empty workdir is created. This 
is confusing if the user intended to check out an existing directory.

This is an accidental feature. It is a very convenient way to create a new 
directory in a session. But the behaviour is likely to confuse a user who 
simply mistyped the name of the directory. There should be a notification 
message explaining that a new directory will be created if you commit any 
changes in this workdir.

Original issue reported on code.google.com by ekb...@gmail.com on 5 Feb 2012 at 10:55

[GoogleCodeExporter]

Original comment by ekb...@gmail.com on 6 Feb 2012 at 9:36

• Changed title: There should be an warning message when checking out non-existing subdir