BUG: Improve message 'ERROR: Not a branch:'

[Jari Aalto]

Consider this:

    $ bzr co git-core-1.5.2.4/debian
    bzr: ERROR: Not a branch: /usr/src/net/deb/src/git-1.5.3.rc5/git-core-1.5.2.4/debian/

Opps. Missing directory reference. Should have been:

    bzr co ../git-core-1.5.2.4/debian

SUGGESTION

The error message could be more detailed in this case and display

 bzr: ERROR: Not a branch: /usr/src/net/deb/src/git-1.5.3.rc5/git-core-1.5.2.4/debian/ (no such directory)
        ==================

Jari