Returns a string suitable for titling a window containing this table.

def get_title(self):
        """Returns a string suitable for titling a window containing this table."""
        def _title(context_model):
            context = context_model.context()
            if context is None:
                return "new context*"
            title = os.path.basename(context.load_path) if context.load_path \
                else "new context"
            if context_model.is_modified():
                title += '*'
            return title

        if self.diff_mode:
            diff_title = _title(self.diff_context_model)
            if self.diff_from_source:
                diff_title += "'"
            return "%s  %s  %s" % (_title(self.context_model),
                                   self.short_double_arrow, diff_title)
        else:
            return _title(self.context_model)