Hysteretic!  test.py severity passes, then fails.

Problem caused somewhere in set_root?  Doctest?  Bzr?

libbe/plugin.py adds the BE-path to sys.path, but it is done by the
time the TestRunner fires up...  Wierd.

$ python test.py severity set_root severity
Doctest: becommands.severity.execute ... ok
Doctest: becommands.set_root.execute ... FAIL
Doctest: becommands.severity.execute ... FAIL

======================================================================
FAIL: Doctest: becommands.set_root.execute
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python2.5/doctest.py", line 2128, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for becommands.set_root.execute
  File "/home/wking/src/fun/be-bugfix/becommands/set_root.py", line 22, in execute

----------------------------------------------------------------------
File "/home/wking/src/fun/be-bugfix/becommands/set_root.py", line 41, in becommands.set_root.execute
Failed example:
    print rcs.name
Expected:
    Arch
Got:
    bzr
----------------------------------------------------------------------
File "/home/wking/src/fun/be-bugfix/becommands/set_root.py", line 43, in becommands.set_root.execute
Failed example:
    execute([])
Expected:
    Using Arch for revision control.
    Directory initialized.
Got:
    Using bzr for revision control.
    Directory initialized.


======================================================================
FAIL: Doctest: becommands.severity.execute
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python2.5/doctest.py", line 2128, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for becommands.severity.execute
  File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 22, in execute

----------------------------------------------------------------------
File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 25, in becommands.severity.execute
Failed example:
    bd = bugdir.simple_bug_dir()
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python2.5/doctest.py", line 1228, in __run
        compileflags, 1) in test.globs
      File "<doctest becommands.severity.execute[1]>", line 1, in <module>
        bd = bugdir.simple_bug_dir()
      File "/home/wking/src/fun/be-bugfix/libbe/bugdir.py", line 293, in simple_bug_dir
        bugdir = BugDir(dir.path, sink_to_existing_root=False, allow_rcs_init=True)
      File "/home/wking/src/fun/be-bugfix/libbe/bugdir.py", line 99, in __init__
        rcs = self.guess_rcs(allow_rcs_init)
      File "/home/wking/src/fun/be-bugfix/libbe/bugdir.py", line 165, in guess_rcs
        rcs = installed_rcs()
      File "/home/wking/src/fun/be-bugfix/libbe/rcs.py", line 53, in installed_rcs
        return _get_matching_rcs(lambda rcs: rcs.installed())
      File "/home/wking/src/fun/be-bugfix/libbe/rcs.py", line 37, in _get_matching_rcs
        if matchfn(rcs) == True:
      File "/home/wking/src/fun/be-bugfix/libbe/rcs.py", line 53, in <lambda>
        return _get_matching_rcs(lambda rcs: rcs.installed())
      File "/home/wking/src/fun/be-bugfix/libbe/rcs.py", line 180, in installed
        self._rcs_help()
      File "/home/wking/src/fun/be-bugfix/libbe/bzr.py", line 32, in _rcs_help
        status,output,error = self._u_invoke_client("--help")
      File "/home/wking/src/fun/be-bugfix/libbe/rcs.py", line 362, in _u_invoke_client
        return self._u_invoke(cl_args, expect, cwd=directory)
      File "/home/wking/src/fun/be-bugfix/libbe/rcs.py", line 355, in _u_invoke
        raise CommandError(error, status)
    CommandError: Command failed (1): 'import site' failed; use -v for traceback
    bzr: ERROR: Couldn't import bzrlib and dependencies.
    Please check bzrlib is on your PYTHONPATH.

    Traceback (most recent call last):
      File "/usr/bin/bzr", line 64, in <module>
        import bzrlib
    ImportError: No module named bzrlib

----------------------------------------------------------------------
File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 26, in becommands.severity.execute
Failed example:
    os.chdir(bd.root)
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python2.5/doctest.py", line 1228, in __run
        compileflags, 1) in test.globs
      File "<doctest becommands.severity.execute[2]>", line 1, in <module>
        os.chdir(bd.root)
    NameError: name 'bd' is not defined
----------------------------------------------------------------------
File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 27, in becommands.severity.execute
Failed example:
    execute(["a"])
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python2.5/doctest.py", line 1228, in __run
        compileflags, 1) in test.globs
      File "<doctest becommands.severity.execute[3]>", line 1, in <module>
        execute(["a"])
      File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 40, in execute
        bd = bugdir.BugDir(loadNow=True)
      File "/home/wking/src/fun/be-bugfix/libbe/bugdir.py", line 85, in __init__
        root = os.getcwd()
    OSError: [Errno 2] No such file or directory
----------------------------------------------------------------------
File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 29, in becommands.severity.execute
Failed example:
    execute(["a", "wishlist"])
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python2.5/doctest.py", line 1228, in __run
        compileflags, 1) in test.globs
      File "<doctest becommands.severity.execute[4]>", line 1, in <module>
        execute(["a", "wishlist"])
      File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 40, in execute
        bd = bugdir.BugDir(loadNow=True)
      File "/home/wking/src/fun/be-bugfix/libbe/bugdir.py", line 85, in __init__
        root = os.getcwd()
    OSError: [Errno 2] No such file or directory
----------------------------------------------------------------------
File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 30, in becommands.severity.execute
Failed example:
    execute(["a"])
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python2.5/doctest.py", line 1228, in __run
        compileflags, 1) in test.globs
      File "<doctest becommands.severity.execute[5]>", line 1, in <module>
        execute(["a"])
      File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 40, in execute
        bd = bugdir.BugDir(loadNow=True)
      File "/home/wking/src/fun/be-bugfix/libbe/bugdir.py", line 85, in __init__
        root = os.getcwd()
    OSError: [Errno 2] No such file or directory
----------------------------------------------------------------------
File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 32, in becommands.severity.execute
Failed example:
    execute(["a", "none"])
Expected:
    Traceback (most recent call last):
    UserError: Invalid severity level: none
Got:
    Traceback (most recent call last):
      File "/usr/lib/python2.5/doctest.py", line 1228, in __run
        compileflags, 1) in test.globs
      File "<doctest becommands.severity.execute[6]>", line 1, in <module>
        execute(["a", "none"])
      File "/home/wking/src/fun/be-bugfix/becommands/severity.py", line 40, in execute
        bd = bugdir.BugDir(loadNow=True)
      File "/home/wking/src/fun/be-bugfix/libbe/bugdir.py", line 85, in __init__
        root = os.getcwd()
    OSError: [Errno 2] No such file or directory


----------------------------------------------------------------------
Ran 3 tests in 8.719s

FAILED (failures=2)