* bzrlib/tests/blackbox/test_update.py: Fix imports and replace the assertContainsRe with assertEqualDiff to make the test clearer, more robust and easier to debug.
* bzrlib/tests/blackbox/test_filtered_view_ops.py: Fix imports and strange accesses to base class methods. (TestViewTreeOperations.test_view_on_update): Avoid os.chdir() call, simplify string matching assertions.
* bzrlib/builtins.py: (cmd_update.run): Fix spurious space, get rid of the final '/' for the base path, don't add a final period (it's a legal char in a path and would be annoying for people that like to copy/paste).