[MERGE] Improvements to bzr added|modified

[Ian Clatworthy]

Adrian Wilkins wrote:

> Simplified tests (removed dependency on osutils module) and added NEWS
> as requested.

Thanks. Some very minor tweaks required. The person submitting this to PQM
will do those when merging (assuming the second reviewer is happy).

bb:tweak

> +    def test_added_null_seperator(self):
> +        """Test that added uses it's null operator properly"""

s/seperator/separator/
s/it's/its/

> +        # multiple unknown files, including one with a space in it's name
> +        self.build_tree(['b', 'c', 'd e'])

s/it's/its/

Ian C.