Dash sign turns on green color

[vicF]

When I add message containing minus sign it highlights following string with green. Plus sign makes following string red.
Is it an expected behavior for all assertion messages?
I use my own message formatting and coloring with symphony console. Changing color after + and - conflicts with my color scheme. But the worse problem is that when I try to make a link in terminal to url containing "-" it becomes broken. Is there a way to disable modifications of user message?